---
title: Grey hair grows when colour cells in the roots stop making melanin,… — Hair: growing, curly and straight, eyebrows, eye… · tree and pragmatics
description: Grey hair grows when colour cells in the roots stop making melanin, and many people start to go grey in their thirties or forties. Who acts: Grey hair, colour cells, many people. A sentence of the lesson «Hair: growing, curly and straight, eyebrows, eyelashes and going grey» of the biology course of
---

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# Hair: growing, curly and straight, eyebrows, eyelashes and going grey, sentence 13

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Grey hair grows when colour cells in the roots stop making melanin, and many people start to go grey in their thirties or forties.

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**Who acts:** Grey hair, colour cells, many people · **What happens:** grow, stop, make, start, go · **To what, where:** melanin, thirties

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This is a sentence of the lesson «Hair: growing, curly and straight, eyebrows, eyelashes and going grey» of the biology course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (Grey hair, colour cells, many people), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:355-hair-growing-curly-and-straight-eyebrows-eyelashes-and-going-grey.lesson:13
# text = Grey hair grows when colour cells in the roots stop making melanin, and many people start to go grey in their thirties or forties.
# source = school lesson (ours)
# course = biology
# lesson = 355-hair-growing-curly-and-straight-eyebrows-eyelashes-and-going-grey.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1
1	Grey	grey	ADJ	JJ	Degree=Pos	2	amod	_	_
2	hair	hair	NOUN	NN	Number=Sing	3	nsubj	_	_
3	grows	grow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	when	when	ADV	WRB	PronType=Int	10	advmod	_	_
5	colour	colour	NOUN	NN	Number=Sing	6	compound	_	_
6	cells	cell	NOUN	NNS	Number=Plur	10	nsubj	_	_
7	in	in	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	roots	root	NOUN	NNS	Number=Plur	6	nmod	_	_
10	stop	stop	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	advcl	_	_
11	making	make	VERB	VBG	VerbForm=Ger	10	xcomp	_	_
12	melanin	melanin	NOUN	NN	Number=Sing	11	obj	_	_
13	,	,	PUNCT	,	_	17	punct	_	_
14	and	and	CCONJ	CC	_	17	cc	_	_
15	many	many	ADJ	JJ	Degree=Pos	16	amod	_	_
16	people	people	NOUN	NNS	Number=Plur	17	nsubj	_	_
17	start	start	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
18	to	to	PART	TO	_	19	mark	_	_
19	go	go	VERB	VB	VerbForm=Inf	17	xcomp	_	_
20	grey	grey	ADJ	JJ	Degree=Pos	19	xcomp	_	_
21	in	in	ADP	IN	_	23	case	_	_
22	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	23	nmod:poss	_	_
23	thirties	thirty	NOUN	NNS	Number=Plur	19	obl	_	Agree=R5-strong|Haiku=20:obl
24	or	or	CCONJ	CC	_	25	cc	_	_
25	forties	forty	NOUN	NNS	Number=Plur	23	conj	_	_
26	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **grow** | present | Grey hair |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |
| 2 | **stop** | present | colour cells in the roots |  |  |  |  |  | vn stop-55.4-1-1 «NP V S\_ING»: agent=Affector clause=Eventuality |
| 3 | **make** | gerund | colour cells in the roots *not said here* | melanin |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset melanin=Product |
| 4 | **start** | present | many people |  |  |  |  |  | vn begin-55.1-1-1 «NP V S\_INF»: agent=Agent clause=Eventuality |
| 5 | **go** | to-infinitive | many people *not said here* |  |  | people's thirties or forties |  | grey *property* | vn occur-48.3-2 «NP V PP»: agent=Theme in thirty=Location |

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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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:biology:355-hair-growing-curly-and-straight-eyebrows-eyelashes-and-going-grey.lesson:13`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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