---
title: A polar bear's hairs are see-through and hollow and its skin is blac… — How animals hide: camouflage and mimicry · tree and pragmatics
description: A polar bear's hairs are see-through and hollow and its skin is black; the clear hairs scatter light, so the bear looks white against the ice; zoo polar bears have even turned a bit green when tiny algae grew inside their hollow hairs. Who acts: hairs, skin, clear hairs, bear. A sentence of the less
---

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# How animals hide: camouflage and mimicry, sentence 8

<!-- .ven lang=en -->
A polar bear's hairs are see-through and hollow and its skin is black; the clear hairs scatter light, so the bear looks white against the ice; zoo polar bears have even turned a bit green when tiny algae grew inside their hollow hairs.

<!-- .vintro -->
**Who acts:** hairs, skin, clear hairs, bear, zoo polar bears, tiny algae · **What happens:** be, scatter, look, turn, grow · **To what, where:** light, hollow hairs

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This is a sentence of the lesson «How animals hide: camouflage and mimicry» 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 (hairs, skin, clear hairs, bear), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:051-how-animals-hide.lesson:8
# text = A polar bear's hairs are see-through and hollow and its skin is black; the clear hairs scatter light, so the bear looks white against the ice; zoo polar bears have even turned a bit green when tiny algae grew inside their hollow hairs.
# source = school lesson (ours)
# course = biology
# lesson = 051-how-animals-hide.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, R7-rel-agree ×2
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	polar	polar	ADJ	JJ	Degree=Pos	3	amod	_	_
3	bear	bear	NOUN	NN	Number=Sing	5	nmod:poss	_	_
4	's	's	PART	POS	_	3	case	_	_
5	hairs	hair	NOUN	NNS	Number=Plur	9	nsubj	_	_
6	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	cop	_	_
7	see	see	ADJ	JJ	Degree=Pos	9	compound	_	_
8	-	-	PUNCT	HYPH	_	9	punct	_	_
9	through	through	ADJ	JJ	Degree=Pos	0	root	_	_
10	and	and	CCONJ	CC	_	11	cc	_	_
11	hollow	hollow	ADJ	JJ	Degree=Pos	9	conj	_	_
12	and	and	CCONJ	CC	_	16	cc	_	_
13	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
14	skin	skin	NOUN	NN	Number=Sing	16	nsubj	_	_
15	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	16	cop	_	_
16	black	black	ADJ	JJ	Degree=Pos	9	conj	_	_
17	;	;	PUNCT	,	_	22	punct	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	20	det	_	_
19	clear	clear	ADJ	JJ	Degree=Pos	20	amod	_	_
20	hairs	hair	NOUN	NNS	Number=Plur	21	nsubj	_	_
21	scatter	scatter	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	parataxis	_	_
22	light	light	NOUN	NN	Number=Sing	21	obj	_	_
23	,	,	PUNCT	,	_	27	punct	_	_
24	so	so	ADV	RB	_	27	advmod	_	_
25	the	the	DET	DT	Definite=Def|PronType=Art	26	det	_	_
26	bear	bear	NOUN	NN	Number=Sing	27	nsubj	_	_
27	looks	look	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	21	advcl	_	_
28	white	white	ADJ	JJ	Degree=Pos	27	xcomp	_	_
29	against	against	ADP	IN	_	31	case	_	_
30	the	the	DET	DT	Definite=Def|PronType=Art	31	det	_	_
31	ice	ice	NOUN	NN	Number=Sing	28	obl	_	_
32	;	;	PUNCT	,	_	38	punct	_	_
33	zoo	zoo	NOUN	NN	Number=Sing	35	compound	_	_
34	polar	polar	ADJ	JJ	Degree=Pos	35	amod	_	_
35	bears	bear	NOUN	NNS	Number=Plur	38	nsubj	_	_
36	have	have	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	38	aux	_	_
37	even	even	ADV	RB	_	38	advmod	_	_
38	turned	turn	VERB	VBN	Tense=Past|VerbForm=Part	27	advcl	_	_
39	a	a	DET	DT	Definite=Ind|PronType=Art	40	det	_	Agree=R5-strong|Haiku=41:det
40	bit	bit	NOUN	NN	Number=Sing	41	obl	_	Agree=R7-rel-agree|Haiku=41:compound
41	green	green	ADJ	JJ	Degree=Pos	38	xcomp	_	Agree=R7-rel-agree|Haiku=38:obj|HaikuPos=NOUN:NN:Number=Sing
42	when	when	ADV	WRB	PronType=Rel	45	advmod	_	_
43	tiny	tiny	ADJ	JJ	Degree=Pos	44	amod	_	_
44	algae	alga	NOUN	NNS	Number=Plur	45	nsubj	_	_
45	grew	grow	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	38	advcl	_	_
46	inside	inside	ADP	IN	_	49	case	_	_
47	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	49	nmod:poss	_	_
48	hollow	hollow	ADJ	JJ	Degree=Pos	49	amod	_	_
49	hairs	hair	NOUN	NNS	Number=Plur	45	obl	_	_
50	.	.	PUNCT	.	_	9	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | a polar bear's hairs |  |  |  |  | through *property* | tree rules |
| 2 | **be** |  | a polar bear's hairs *not said here* |  |  |  |  |  | tree rules |
| 3 | **is** | present | bear's skin |  |  |  |  | black *property* | tree rules |
| 4 | **scatter** | present | the clear hairs | light |  |  |  |  | vn spray-9.7-1 «NP V NP.theme»: agent=Agent light=Theme |
| 5 | **look** | present | the bear |  |  |  |  | white *property* | vn stimulus\_subject-30.4 «NP V ADJ»: agent=Stimulus |
| 6 | **turn** | present · perfect | zoo polar bears |  |  |  |  | green *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 7 | **grow** | past | tiny algae |  |  | algae's hollow hairs |  |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme inside hair=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.

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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:051-how-animals-hide.lesson:8`.

**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, R7-rel-agree ×2. **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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