---
title: Ascertain the reason for which spiders have not been farmed for silk… — Spider-Man: real spider silk and webs · tree and pragmatics
description: Ascertain the reason for which spiders have not been farmed for silk in the manner of silkworms. Exam question 4 of lesson 147 «Spider-Man: real spider silk and webs» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's ch
---

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# Exam question 4 · Spider-Man: real spider silk and webs

<!-- .ven lang=en -->
Ascertain the reason for which spiders have not been farmed for silk in the manner of silkworms.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you · **What happens:** ascertain, not farm · **To what, where:** reason, spiders, manner

<!-- .vabout -->
This is exam question 4 of lesson 147 «Spider-Man: real spider silk and webs» 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/147-spider-man-real-spider-silk-and-webs/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:147-spider-man-real-spider-silk-and-webs:e4:1
# text = Ascertain the reason for which spiders have not been farmed for silk in the manner of silkworms.
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	10	obl	_	_
6	spiders	spider	NOUN	NNS	Number=Plur	10	nsubj:pass	_	_
7	have	have	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	10	aux	_	_
8	not	not	PART	RB	Polarity=Neg	10	advmod	_	_
9	been	be	AUX	VBN	Tense=Past|VerbForm=Part	10	aux:pass	_	_
10	farmed	farm	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	parataxis	_	_
11	for	for	ADP	IN	_	12	case	_	_
12	silk	silk	NOUN	NN	Number=Sing	10	obl	_	_
13	in	in	ADP	IN	_	15	case	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	manner	manner	NOUN	NN	Number=Sing	10	obl	_	_
16	of	of	ADP	IN	_	17	case	_	_
17	silkworms	silkworm	NOUN	NNS	Number=Plur	15	nmod	_	SpaceAfter=No
18	.	.	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 | **not** **farm** | present · perfect · passive |  | spiders |  | the manner of silkworms |  | for the reason; for silk | vn rear-26.2.2-1 «NP V NP»: subject=Patient |

<!-- .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 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Spiders cease the production of silk altogether when kept in daylight or in captivity

```conllu
# sent_id = question:biology:147-spider-man-real-spider-silk-and-webs:e4:o1:1
# text = Spiders cease the production of silk altogether when kept in daylight or in captivity
1	Spiders	spider	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	cease	cease	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	production	production	NOUN	NN	Number=Sing	2	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	silk	silk	NOUN	NN	Number=Sing	4	nmod	_	_
7	altogether	altogether	ADV	RB	_	2	advmod	_	_
8	when	when	SCONJ	WRB	_	9	mark	_	_
9	kept	keep	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	advcl	_	_
10	in	in	ADP	IN	_	11	case	_	_
11	daylight	daylight	NOUN	NN	Number=Sing	9	obl	_	_
12	or	or	CCONJ	CC	_	14	cc	_	_
13	in	in	ADP	IN	_	14	case	_	_
14	captivity	captivity	NOUN	NN	Number=Sing	11	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cease** | present | Spiders | the production of silk |  |  |  | altogether *property* | vn stop-55.4-1-1 «NP V NP.eventuality»: agent=Subeventuality production=Eventuality |
| 2 | **keep** | participle | Spiders *not said here* |  |  | daylight or captivity |  |  | vn keep-15.2 «NP V NP PP.location»: agent=Agent in daylight=Location |
| 3 | **produce** |  |  | silk |  |  |  |  | nom production «act transitive»: of=patient |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
Spiders kept together fight with and consume one another

```conllu
# sent_id = question:biology:147-spider-man-real-spider-silk-and-webs:e4:o2:1
# text = Spiders kept together fight with and consume one another
1	Spiders	spider	NOUN	NNS	Number=Plur	4	nsubj	_	_
2	kept	keep	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	1	acl	_	_
3	together	together	ADV	RB	_	2	advmod	_	_
4	fight	fight	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	with	with	ADP	IN	_	4	obl	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	consume	consume	VERB	VB	VerbForm=Inf	4	conj	_	_
8	one	one	NUM	CD	NumForm=Word|NumType=Card	7	obj	_	_
9	another	another	DET	DT	PronType=Ind	8	fixed	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep together** | participle |  | Spiders *not said here* |  |  |  | together *property* | vn keep-15.2 «NP V NP»: agent=Agent |
| 2 | **fight** | present | Spiders |  |  |  |  |  | vn battle-36.4-1 «NP V»: agent=Agent |
| 3 | **consume** | infinitive | Spiders *not said here* | one |  |  |  |  | vn consume-66 «NP V NP»: agent=Agent one=Asset |

### Option 3 {#o3}

<!-- .ven lang=en -->
Spider silk dissolves upon exposure to air

```conllu
# sent_id = question:biology:147-spider-man-real-spider-silk-and-webs:e4:o3:1
# text = Spider silk dissolves upon exposure to air
1	Spider	spider	NOUN	NN	Number=Sing	2	compound	_	_
2	silk	silk	NOUN	NN	Number=Sing	3	nsubj	_	_
3	dissolves	dissolve	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	upon	upon	ADP	IN	_	5	case	_	_
5	exposure	exposure	NOUN	NN	Number=Sing	3	obl	_	_
6	to	to	ADP	IN	_	7	case	_	_
7	air	air	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dissolve** | present | Spider silk |  |  |  |  | upon exposure; to air *result* | vn break-45.1 «NP V PP.result»: agent=Patient to air=Result |

### Option 4 {#o4}

<!-- .ven lang=en -->
Spider silk is too adhesive for any use

```conllu
# sent_id = question:biology:147-spider-man-real-spider-silk-and-webs:e4:o4:1
# text = Spider silk is too adhesive for any use
1	Spider	spider	NOUN	NN	Number=Sing	2	compound	_	_
2	silk	silk	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	too	too	ADV	RB	_	5	advmod	_	_
5	adhesive	adhesive	ADJ	JJ	Degree=Pos	0	root	_	_
6	for	for	ADP	IN	_	8	case	_	_
7	any	any	DET	DT	PronType=Ind	8	det	_	_
8	use	use	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Spider silk |  |  |  |  | for any use; adhesive *property* | tree rules |

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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: [Spider-Man: real spider silk and webs, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/147-spider-man-real-spider-silk-and-webs/e3/)
- next →: [Spider-Man: real spider senses, climbi…, test 1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/148-spider-man-real-spider-senses-climbing-and-bites/t1/)
- ↑ back to [Spider-Man: real spider silk and webs](https://md.mova.elamur.ai/free/en/corpora/questions/biology/147-spider-man-real-spider-silk-and-webs/)