---
title: Polar bears clean themselves carefully after eating and roll in snow… — The polar zone: polar bears · tree and pragmatics
description: Polar bears clean themselves carefully after eating and roll in snow in summer, because clean fur keeps them warm and dirty fur lets cold and water reach the skin. Who acts: Polar bears, clean fur, dirty fur, cold. A sentence of the lesson «The polar zone: polar bears» of the biology course of Mova'
---

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# The polar zone: polar bears, sentence 13

<!-- .ven lang=en -->
Polar bears clean themselves carefully after eating and roll in snow in summer, because clean fur keeps them warm and dirty fur lets cold and water reach the skin.

<!-- .vintro -->
**Who acts:** Polar bears, clean fur, dirty fur, cold · **What happens:** clean, eat, roll, keep, let, reach · **To what, where:** cubs, snow, skin

<!-- .vabout -->
This is a sentence of the lesson «The polar zone: polar bears» 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 (Polar bears, clean fur, dirty fur, cold), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:105-the-polar-zone-polar-bears.lesson:13
# text = Polar bears clean themselves carefully after eating and roll in snow in summer, because clean fur keeps them warm and dirty fur lets cold and water reach the skin.
# source = school lesson (ours)
# course = biology
# lesson = 105-the-polar-zone-polar-bears.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, R8-pos-agree ×1
1	Polar	polar	ADJ	JJ	Degree=Pos	2	amod	_	_
2	bears	bear	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	clean	clean	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	themselves	themselves	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs|Reflex=Yes	3	obj	_	_
5	carefully	carefully	ADV	RB	_	3	advmod	_	_
6	after	after	SCONJ	IN	_	7	mark	_	_
7	eating	eat	VERB	VBG	Tense=Pres|VerbForm=Part	3	advcl	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	roll	roll	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	conj	_	Agree=R8-pos-agree|Haiku=7:conj|HaikuPos=VERB:VB:VerbForm=Inf
10	in	in	ADP	IN	_	11	case	_	_
11	snow	snow	NOUN	NN	Number=Sing	9	obl	_	Agree=R5-strong|Haiku=7:obl
12	in	in	ADP	IN	_	13	case	_	_
13	summer	summer	NOUN	NN	Number=Sing	7	obl	_	_
14	,	,	PUNCT	,	_	18	punct	_	_
15	because	because	SCONJ	IN	_	18	mark	_	_
16	clean	clean	ADJ	JJ	Degree=Pos	17	amod	_	_
17	fur	fur	NOUN	NN	Number=Sing	18	nsubj	_	_
18	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
19	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	18	obj	_	_
20	warm	warm	ADJ	JJ	Degree=Pos	18	xcomp	_	_
21	and	and	CCONJ	CC	_	24	cc	_	_
22	dirty	dirty	ADJ	JJ	Degree=Pos	23	amod	_	_
23	fur	fur	NOUN	NN	Number=Sing	24	nsubj	_	_
24	lets	let	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	18	conj	_	_
25	cold	cold	ADJ	JJ	Degree=Pos	28	nsubj	_	_
26	and	and	CCONJ	CC	_	27	cc	_	_
27	water	water	NOUN	NN	Number=Sing	25	conj	_	_
28	reach	reach	VERB	VB	VerbForm=Inf	24	xcomp	_	_
29	the	the	DET	DT	Definite=Def|PronType=Art	30	det	_	_
30	skin	skin	NOUN	NN	Number=Sing	28	obj	_	_
31	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **clean** | present | Polar bears | cubs *= cub* |  |  |  | carefully *property* | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent themselves=Patient |
| 2 | **eat** | gerund | Polar bears *not said here* |  |  |  | summer |  | vn eat-39.1-1 «NP V»: agent=Agent |
| 3 | **roll** | present | Polar bears *not said here* |  |  | snow |  |  | vn run-51.3.2-2 «NP V PP.location»: agent=Theme in snow=Trajectory |
| 4 | **keep** | present | clean fur | cubs *= cub* |  |  |  | warm *property* | vn keep-15.2 «NP V NP»: agent=Agent they=Theme |
| 5 | **let** | present | dirty fur |  |  |  |  |  | tree rules |
| 6 | **reach** | infinitive | cold and water | the skin |  |  |  |  | vn body\_motion-49.2-1-1 «NP V NP ADV»: agent=Agent skin=Theme |

<!-- .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:105-the-polar-zone-polar-bears.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, R8-pos-agree ×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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