---
title: Which is a natural dye? — Dyes, inks and colouring · tree and pragmatics
description: Which is a natural dye? Test 9 of lesson 27 «Dyes, inks and colouring» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Test 9 · Dyes, inks and colouring

<!-- .ven lang=en -->
Which is a natural dye?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **What happens:** be · **To what, where:** natural dye

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This is test 9 of lesson 27 «Dyes, inks and colouring» of the chemistry course of Mova's primary school. 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/chemistry/27-dyes-inks-colouring/#t9).

## The question {#question}

```conllu
# sent_id = question:chemistry:27-dyes-inks-colouring:t9:1
# text = Which is a natural dye?
1	Which	which	PRON	WDT	PronType=Rel	5	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	natural	natural	ADJ	JJ	Degree=Pos	5	amod	_	_
5	dye	dye	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
6	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present |  | a natural dye |  |  |  |  | tree rules |

<!-- .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 -->
Perkin's purple from 1856

```conllu
# sent_id = question:chemistry:27-dyes-inks-colouring:t9:o1:1
# text = Perkin's purple from 1856
1	Perkin	Perkin	PROPN	NNP	Number=Sing	3	nmod:poss	_	SpaceAfter=No
2	's	's	PART	POS	_	1	case	_	_
3	purple	purple	NOUN	NN	Number=Sing	0	root	_	_
4	from	from	ADP	IN	_	5	case	_	_
5	1856	1856	NUM	CD	NumForm=Digit|NumType=Card	3	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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

<!-- .ven lang=en -->
Onion skins boiled in water

```conllu
# sent_id = question:chemistry:27-dyes-inks-colouring:t9:o2:1
# text = Onion skins boiled in water
1	Onion	onion	NOUN	NN	Number=Sing	2	compound	_	_
2	skins	skin	NOUN	NNS	Number=Plur	0	root	_	_
3	boiled	boil	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	acl	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	water	water	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **boil** | participle |  | Onion skins *not said here* |  |  |  | in water | vn cooking-45.3 «NP V PP.result PP.instrument»: agent=Patient in water=Instrument |

### Option 3 {#o3}

<!-- .ven lang=en -->
Indigo from a factory

```conllu
# sent_id = question:chemistry:27-dyes-inks-colouring:t9:o3:1
# text = Indigo from a factory
1	Indigo	indigo	NOUN	NN	Number=Sing	0	root	_	_
2	from	from	ADP	IN	_	4	case	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	factory	factory	NOUN	NN	Number=Sing	1	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
Ink from a felt-tip pen

```conllu
# sent_id = question:chemistry:27-dyes-inks-colouring:t9:o4:1
# text = Ink from a felt-tip pen
1	Ink	ink	NOUN	NN	Number=Sing	0	root	_	_
2	from	from	ADP	IN	_	7	case	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
4	felt	felt	NOUN	NN	Number=Sing	6	compound	_	SpaceAfter=No
5	-	-	PUNCT	HYPH	_	4	punct	_	SpaceAfter=No
6	tip	tip	NOUN	NN	Number=Sing	7	compound	_	_
7	pen	pen	NOUN	NN	Number=Sing	1	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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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.

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- ← previous: [Dyes, inks and colouring, test 8](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/27-dyes-inks-colouring/t8/)
- next →: [Dyes, inks and colouring, test 10](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/27-dyes-inks-colouring/t10/)
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