---
title: The male narwhal's tusk is a front tooth up to about 3 metres long t… — The Arctic: ice, snow and the polar bear's world · tree and pragmatics
description: The male narwhal's tusk is a front tooth up to about 3 metres long that grows through its upper lip, and in the Middle Ages such tusks were sold as unicorn horns. Who acts: tusk, front tooth. A sentence of the lesson «The Arctic: ice, snow and the polar bear's world» of the biology course of Mova's 
---

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# The Arctic: ice, snow and the polar bear's world, sentence 12

<!-- .ven lang=en -->
The male narwhal's tusk is a front tooth up to about 3 metres long that grows through its upper lip, and in the Middle Ages such tusks were sold as unicorn horns.

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**Who acts:** tusk, front tooth · **What happens:** be, grow, sell · **To what, where:** front tooth, upper lip, such tusks, Middle Ages

<!-- .vabout -->
This is a sentence of the lesson «The Arctic: ice, snow and the polar bear's world» 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 (tusk, front tooth), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:006-the-arctic.lesson:12
# text = The male narwhal's tusk is a front tooth up to about 3 metres long that grows through its upper lip, and in the Middle Ages such tusks were sold as unicorn horns.
# source = school lesson (ours)
# course = biology
# lesson = 006-the-arctic.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 ×1
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	male	male	ADJ	JJ	Degree=Pos	3	amod	_	_
3	narwhal	narwhal	NOUN	NN	Number=Sing	5	nmod:poss	_	_
4	's	's	PART	POS	_	3	case	_	_
5	tusk	tusk	NOUN	NN	Number=Sing	9	nsubj	_	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	front	front	ADJ	JJ	Degree=Pos	9	amod	_	_
9	tooth	tooth	NOUN	NN	Number=Sing	0	root	_	_
10	up	up	ADV	RB	_	9	advmod	_	_
11	to	to	ADP	IN	_	14	case	_	_
12	about	about	ADV	RB	_	13	advmod	_	_
13	3	3	NUM	CD	NumForm=Digit|NumType=Card	14	nummod	_	_
14	metres	metre	NOUN	NNS	Number=Plur	15	obl	_	Agree=R5-strong|Haiku=9:nmod
15	long	long	ADJ	JJ	Degree=Pos	9	amod	_	Agree=R7-rel-agree|Haiku=9:advmod|HaikuPos=ADV:RB:Degree=Pos
16	that	that	PRON	WDT	PronType=Rel	17	nsubj	_	_
17	grows	grow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	acl:relcl	_	_
18	through	through	ADP	IN	_	21	case	_	_
19	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	21	nmod:poss	_	_
20	upper	upper	ADJ	JJ	Degree=Pos	21	amod	_	_
21	lip	lip	NOUN	NN	Number=Sing	17	obl	_	_
22	,	,	PUNCT	,	_	31	punct	_	_
23	and	and	CCONJ	CC	_	31	cc	_	_
24	in	in	ADP	IN	_	27	case	_	_
25	the	the	DET	DT	Definite=Def|PronType=Art	27	det	_	_
26	Middle	Middle	ADJ	NNP	Degree=Pos	27	amod	_	_
27	Ages	Age	PROPN	NNPS	Number=Plur	31	obl	_	_
28	such	such	ADJ	JJ	Degree=Pos	29	amod	_	_
29	tusks	tusk	NOUN	NNS	Number=Plur	31	nsubj:pass	_	_
30	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	31	aux:pass	_	_
31	sold	sell	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	17	conj	_	_
32	as	as	ADP	IN	_	34	case	_	_
33	unicorn	unicorn	NOUN	NN	Number=Sing	34	compound	_	_
34	horns	horn	NOUN	NNS	Number=Plur	31	obl	_	_
35	.	.	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 a** | present | the male narwhal's tusk | a front tooth |  |  |  |  | tree rules |
| 2 | **grow** | present | a front tooth |  |  | metre's upper lip |  |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme through lip=Location |
| 3 | **sell** | past · passive |  | such tusks |  |  | in the Middle Ages | as unicorn horns | vn give-13.1-1 «NP V NP»: subject=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:006-the-arctic.lesson:12`.

**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 ×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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