---
title: Ascertain the reason for which potatoes are customarily stored in da… — Poisonous plants to stay away from: be… · tree and pragmatics
description: Ascertain the reason for which potatoes are customarily stored in darkness. Exam question 4 of lesson 392 «Poisonous plants to stay away from: berries, foxglove, yew and nightshade» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each op
---

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# Exam question 4 · Poisonous plants to stay away from: berries, foxglove, yew…

<!-- .ven lang=en -->
Ascertain the reason for which potatoes are customarily stored in darkness.

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **Who acts:** you · **What happens:** ascertain, store · **To what, where:** reason, potatoes, darkness

<!-- .vabout -->
This is exam question 4 of lesson 392 «Poisonous plants to stay away from: berries, foxglove, yew and nightshade» of the biology course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/biology/392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade:e4:1
# text = Ascertain the reason for which potatoes are customarily stored in darkness.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	9	obl	_	_
6	potatoes	potato	NOUN	NNS	Number=Plur	9	nsubj:pass	_	_
7	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	aux:pass	_	_
8	customarily	customarily	ADV	RB	_	9	advmod	_	_
9	stored	store	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl:relcl	_	_
10	in	in	ADP	IN	_	11	case	_	_
11	darkness	darkness	NOUN	NN	Number=Sing	9	obl	_	SpaceAfter=No
12	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the reason |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent reason=Topic |
| 2 | **store** | present · passive |  | potatoes |  | darkness |  | for the reason; customarily *property* | vn keep-15.2 «NP V NP PP.location»: subject=Theme in darkness=Location |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Darkness causes them to double in size

```conllu
# sent_id = question:biology:392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade:e4:o1:1
# text = Darkness causes them to double in size
1	Darkness	darkness	NOUN	NN	Number=Sing	2	nsubj	_	_
2	causes	cause	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	2	obj	_	_
4	to	to	PART	TO	_	5	mark	_	_
5	double	double	VERB	VB	VerbForm=Inf	2	xcomp	_	_
6	in	in	ADP	IN	_	7	case	_	_
7	size	size	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cause** | present | Darkness | them *= they* |  |  |  |  | tree rules |
| 2 | **double** | to-infinitive | them *= they* *not said here* |  |  | size |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

### Option 2 · ← Mova's choice · ✓ the right answer {#o2}

<!-- .ven lang=en -->
Exposure to light causes them to turn green and to produce a greater quantity of poison

<!-- fold The tree, 16 words -->
```conllu
# sent_id = question:biology:392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade:e4:o2:1
# text = Exposure to light causes them to turn green and to produce a greater quantity of poison
1	Exposure	exposure	NOUN	NN	Number=Sing	4	nsubj	_	_
2	to	to	ADP	IN	_	3	case	_	_
3	light	light	NOUN	NN	Number=Sing	1	nmod	_	_
4	causes	cause	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	4	obj	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	turn	turn	VERB	VB	VerbForm=Inf	4	xcomp	_	_
8	green	green	ADJ	JJ	Degree=Pos	7	xcomp	_	_
9	and	and	CCONJ	CC	_	11	cc	_	_
10	to	to	PART	TO	_	11	mark	_	_
11	produce	produce	VERB	VB	VerbForm=Inf	7	conj	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
13	greater	great	ADJ	JJR	Degree=Cmp	14	amod	_	_
14	quantity	quantity	NOUN	NN	Number=Sing	11	obj	_	_
15	of	of	ADP	IN	_	16	case	_	_
16	poison	poison	NOUN	NN	Number=Sing	14	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cause** | present | Exposure to light | them *= they* |  |  |  |  | tree rules |
| 2 | **turn** | to-infinitive | them *= they* *not said here* |  |  |  |  | green *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 3 | **produce** | to-infinitive | them *= they* *not said here* | a greater quantity of poison |  |  |  |  | vn create-26.4 «NP V NP»: agent=Agent quantity=Result |

### Option 3 {#o3}

<!-- .ven lang=en -->
Exposure to light renders them excessively sweet and unfit for the preparation of any meal

<!-- fold The tree, 15 words -->
```conllu
# sent_id = question:biology:392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade:e4:o3:1
# text = Exposure to light renders them excessively sweet and unfit for the preparation of any meal
1	Exposure	exposure	NOUN	NN	Number=Sing	0	root	_	_
2	to	to	ADP	IN	_	4	case	_	_
3	light	light	NOUN	NN	Number=Sing	4	compound	_	_
4	renders	render	NOUN	NNS	Number=Plur	1	nmod	_	_
5	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	7	nsubj	_	_
6	excessively	excessively	ADV	RB	_	7	advmod	_	_
7	sweet	sweet	ADJ	JJ	Degree=Pos	4	acl:relcl	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	unfit	unfit	ADJ	JJ	Degree=Pos	7	conj	_	_
10	for	for	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	preparation	preparation	NOUN	NN	Number=Sing	7	obl	_	_
13	of	of	ADP	IN	_	15	case	_	_
14	any	any	DET	DT	PronType=Ind	15	det	_	_
15	meal	meal	NOUN	NN	Number=Sing	12	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **prepare** |  |  | any meal |  |  |  |  | nom preparation «act transitive»: of=patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Darkness prevents their consumption by birds

```conllu
# sent_id = question:biology:392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade:e4:o4:1
# text = Darkness prevents their consumption by birds
1	Darkness	darkness	NOUN	NN	Number=Sing	2	nsubj	_	_
2	prevents	prevent	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	4	nmod:poss	_	_
4	consumption	consumption	NOUN	NN	Number=Sing	2	obj	_	_
5	by	by	ADP	IN	_	6	case	_	_
6	birds	bird	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **prevent** | present | Darkness | their consumption |  |  |  | by birds | vn forbid-64.4-1 «NP V NP»: agent=Causer consumption=Theme |
| 2 | **consume** |  | their *= they* |  |  |  |  |  | nom consumption «act transitive»: poss=agent |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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- ← previous: [Poisonous plants to stay away from: be…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade/e3/)
- next →: [Mushrooms and creatures to avoid in th…, test 1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/393-mushrooms-and-creatures-to-avoid-in-the-woods-death-caps-adders-ticks-and-hornets/t1/)
- ↑ back to [Poisonous plants to stay away from: berries, foxglove, yew and nightshade](https://md.mova.elamur.ai/free/en/corpora/questions/biology/392-poisonous-plants-to-stay-away-from-berries-foxglove-yew-and-nightshade/)