---
title: A coral reef looks like coloured rock, but it is built by billions o… — Coral reefs, rockpools and the seashore · tree and pragmatics
description: A coral reef looks like coloured rock, but it is built by billions of tiny animals called polyps, cousins of jellyfish, that make limestone skeletons and keep tiny algae inside their bodies to share food made from sunlight. Who acts: coral reef, billions, tiny animals. A sentence of the lesson «Cora
---

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# Coral reefs, rockpools and the seashore, sentence 0

<!-- .ven lang=en -->
A coral reef looks like coloured rock, but it is built by billions of tiny animals called polyps, cousins of jellyfish, that make limestone skeletons and keep tiny algae inside their bodies to share food made from sunlight.

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**Who acts:** coral reef, billions, tiny animals · **What happens:** look, build, call, make, keep, share · **To what, where:** reef, polyps, limestone skeletons, tiny algae, bodies, food · **Speech:** someone speaks here

<!-- .vabout -->
This is a sentence of the lesson «Coral reefs, rockpools and the seashore» 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 (coral reef, billions, tiny animals), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:009-coral-reefs-rockpools-and-the-seashore.lesson:0
# text = A coral reef looks like coloured rock, but it is built by billions of tiny animals called polyps, cousins of jellyfish, that make limestone skeletons and keep tiny algae inside their bodies to share food made from sunlight.
# source = school lesson (ours)
# course = biology
# lesson = 009-coral-reefs-rockpools-and-the-seashore.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 ×3, R7-rel-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	coral	coral	ADJ	JJ	Degree=Pos	3	amod	_	_
3	reef	reef	NOUN	NN	Number=Sing	4	nsubj	_	_
4	looks	look	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	like	like	ADP	IN	_	7	case	_	_
6	coloured	coloured	ADJ	JJ	Degree=Pos	7	amod	_	_
7	rock	rock	NOUN	NN	Number=Sing	4	obl	_	_
8	,	,	PUNCT	,	_	12	punct	_	_
9	but	but	CCONJ	CC	_	12	cc	_	_
10	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	12	nsubj:pass	_	_
11	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	aux:pass	_	_
12	built	build	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	conj	_	_
13	by	by	ADP	IN	_	14	case	_	_
14	billions	billion	NOUN	NNS	Number=Plur	12	obl	_	_
15	of	of	ADP	IN	_	17	case	_	_
16	tiny	tiny	ADJ	JJ	Degree=Pos	17	amod	_	_
17	animals	animal	NOUN	NNS	Number=Plur	14	nmod	_	_
18	called	call	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	17	acl	_	_
19	polyps	polyp	NOUN	NNS	Number=Plur	18	xcomp	_	Agree=R7-rel-agree|Haiku=18:obj
20	,	,	PUNCT	,	_	21	punct	_	_
21	cousins	cousin	NOUN	NNS	Number=Plur	14	conj	_	_
22	of	of	ADP	IN	_	23	case	_	_
23	jellyfish	jellyfish	NOUN	NNS	Number=Plur	21	nmod	_	_
24	,	,	PUNCT	,	_	26	punct	_	_
25	that	that	PRON	WDT	PronType=Rel	26	nsubj	_	_
26	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	17	acl:relcl	_	Agree=R5-strong|Haiku=21:acl:relcl
27	limestone	limestone	NOUN	NN	Number=Sing	28	compound	_	_
28	skeletons	skeleton	NOUN	NNS	Number=Plur	26	obj	_	_
29	and	and	CCONJ	CC	_	30	cc	_	_
30	keep	keep	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	26	conj	_	_
31	tiny	tiny	ADJ	JJ	Degree=Pos	32	amod	_	_
32	algae	alga	NOUN	NNS	Number=Plur	30	obj	_	_
33	inside	inside	ADP	IN	_	35	case	_	_
34	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	35	nmod:poss	_	_
35	bodies	body	NOUN	NNS	Number=Plur	30	obl	_	Agree=R5-strong|Haiku=32:nmod
36	to	to	PART	TO	_	37	mark	_	_
37	share	share	VERB	VB	VerbForm=Inf	30	advcl	_	Agree=R5-strong|Haiku=35:acl
38	food	food	NOUN	NN	Number=Sing	37	obj	_	_
39	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	38	acl	_	_
40	from	from	ADP	IN	_	41	case	_	_
41	sunlight	sunlight	NOUN	NN	Number=Sing	39	obl	_	_
42	.	.	PUNCT	.	_	4	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 | **look** | present | a coral reef |  |  |  |  | like coloured rock | vn stimulus\_subject-30.4 «NP V PP.attribute»: agent=Stimulus |
| 2 | **build** | present · passive | billions of tiny animals and cousins of jellyfish | reef |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset subject=Product |
| 3 | **call** | participle | tiny animals *not said here* | polyps |  |  |  |  | vn initiate\_communication-37.4.2-1 «NP V»: agent=Agent |
| 4 | **make** | present | tiny animals | limestone skeletons |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset skeleton=Product |
| 5 | **keep** | present | tiny animals *not said here* | tiny algae |  | algae's bodies |  |  | vn keep-15.2 «NP V NP PP.location»: agent=Agent alga=Theme inside body=Location |
| 6 | **share** | to-infinitive | tiny animals *not said here* | food |  |  |  |  | tree rules |
| 7 | **make** | participle |  | food *not said here* |  | sunlight |  |  | vn build-26.1-1 «NP.asset V PP»: agent=Asset from sunlight=Material |

<!-- .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:009-coral-reefs-rockpools-and-the-seashore.lesson:0`.

**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 ×3, 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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