---
title: Sea urchins are covered with movable spines that point towards a thr… — Defences: skunks, porcupines, hedgehogs and armour · tree and pragmatics
description: Sea urchins are covered with movable spines that point towards a threat, and their mouth underneath has five teeth called Aristotle's lantern. Who acts: movable spines, mouth, five teeth. A sentence of the lesson «Defences: skunks, porcupines, hedgehogs and armour» of the biology course of Mova's pr
---

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# Defences: skunks, porcupines, hedgehogs and armour, sentence 11

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Sea urchins are covered with movable spines that point towards a threat, and their mouth underneath has five teeth called Aristotle's lantern.

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**Who acts:** movable spines, mouth, five teeth · **What happens:** cover, point, have, call · **To what, where:** Sea urchins, five teeth, lantern · **Speech:** someone speaks here

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This is a sentence of the lesson «Defences: skunks, porcupines, hedgehogs and armour» 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 (movable spines, mouth, five teeth), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:248-defences-skunks-porcupines-hedgehogs-and-armour.lesson:11
# text = Sea urchins are covered with movable spines that point towards a threat, and their mouth underneath has five teeth called Aristotle's lantern.
# source = school lesson (ours)
# course = biology
# lesson = 248-defences-skunks-porcupines-hedgehogs-and-armour.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): no change
1	Sea	sea	NOUN	NN	Number=Sing	2	compound	_	_
2	urchins	urchin	NOUN	NNS	Number=Plur	4	nsubj:pass	_	_
3	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	aux:pass	_	_
4	covered	cover	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
5	with	with	ADP	IN	_	7	case	_	_
6	movable	movable	ADJ	JJ	Degree=Pos	7	amod	_	_
7	spines	spine	NOUN	NNS	Number=Plur	4	obl	_	_
8	that	that	PRON	WDT	PronType=Rel	9	nsubj	_	_
9	point	point	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	acl:relcl	_	_
10	towards	towards	ADP	IN	_	12	case	_	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
12	threat	threat	NOUN	NN	Number=Sing	9	obl	_	_
13	,	,	PUNCT	,	_	18	punct	_	_
14	and	and	CCONJ	CC	_	18	cc	_	_
15	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	16	nmod:poss	_	_
16	mouth	mouth	NOUN	NN	Number=Sing	18	nsubj	_	_
17	underneath	underneath	ADV	RB	_	18	advmod	_	_
18	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	conj	_	_
19	five	five	NUM	CD	NumForm=Word|NumType=Card	20	nummod	_	_
20	teeth	tooth	NOUN	NNS	Number=Plur	18	obj	_	_
21	called	call	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	20	acl	_	_
22	Aristotle	Aristotle	PROPN	NNP	Number=Sing	24	nmod:poss	_	_
23	's	's	PART	POS	_	22	case	_	_
24	lantern	lantern	NOUN	NN	Number=Sing	21	xcomp	_	_
25	.	.	PUNCT	.	_	4	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 | **cover** | present · passive |  | Sea urchins |  |  |  | with movable spines | vn fill-9.8-1 «NP V NP PP.theme»: subject=Destination with spine=Theme |
| 2 | **point** | present | movable spines |  |  |  |  | towards a threat | vn wink-40.3.1 «NP V PP.recipient»: agent=Agent towards threat=Recipient |
| 3 | **have** | present | urchins's mouth | five teeth |  |  |  | underneath *property* | vn birth-28.2-1 «NP V NP»: agent=Agent tooth=Patient |
| 4 | **call** | participle | five teeth *not said here* | Aristotle's lantern |  |  |  |  | vn initiate\_communication-37.4.2-1 «NP V»: agent=Agent |

<!-- .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:248-defences-skunks-porcupines-hedgehogs-and-armour.lesson:11`.

**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): no change. **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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- next →: [Defences: skunks, porcupines, hedgehog…, 12](https://md.mova.elamur.ai/free/en/corpora/school/biology/248-defences-skunks-porcupines-hedgehogs-and-armour/12/)
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