---
title: Coral reefs cover less than 1 per cent of the ocean floor but are ho… — The aquarium: the coral reef tank · tree and pragmatics
description: Coral reefs cover less than 1 per cent of the ocean floor but are home to about a quarter of all sea fish species. Who acts: Coral reefs. A sentence of the lesson «The aquarium: the coral reef tank» of the biology course of Mova's primary school with its dependency tree and the pragmatics of every c
---

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# The aquarium: the coral reef tank, sentence 4

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Coral reefs cover less than 1 per cent of the ocean floor but are home to about a quarter of all sea fish species.

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**Who acts:** Coral reefs · **What happens:** cover, be · **To what, where:** 1 per cent

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This is a sentence of the lesson «The aquarium: the coral reef tank» 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 reefs), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:090-aquarium-the-coral-reef-tank.lesson:4
# text = Coral reefs cover less than 1 per cent of the ocean floor but are home to about a quarter of all sea fish species.
# source = school lesson (ours)
# course = biology
# lesson = 090-aquarium-the-coral-reef-tank.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	Coral	coral	NOUN	NN	_	2	compound	_	_
2	reefs	reef	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	cover	cover	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	less	less	ADJ	JJR	Degree=Cmp|ExtPos=ADV	6	advmod	_	Agree=R5-strong|Haiku=8:advmod
5	than	than	ADP	IN	_	4	fixed	_	_
6	1	1	NUM	CD	NumForm=Digit|NumType=Card	8	nummod	_	_
7	per	per	NOUN	NN	Number=Sing	8	compound	_	_
8	cent	cent	NOUN	NN	Number=Sing	3	obj	_	_
9	of	of	ADP	IN	_	12	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
11	ocean	ocean	NOUN	NN	Number=Sing	12	compound	_	Agree=R7-rel-agree|Haiku=12:amod|HaikuPos=ADJ:JJ:Degree=Pos
12	floor	floor	NOUN	NN	Number=Sing	8	nmod	_	_
13	but	but	CCONJ	CC	_	19	cc	_	_
14	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	19	cop	_	_
15	home	home	ADV	RB	_	19	advmod	_	_
16	to	to	ADP	IN	_	19	case	_	_
17	about	about	ADV	RB	_	19	advmod	_	_
18	a	a	DET	DT	Definite=Ind|PronType=Art	19	det	_	_
19	quarter	quarter	NOUN	NN	Number=Sing	3	conj	_	_
20	of	of	ADP	IN	_	24	case	_	_
21	all	all	DET	DT	PronType=Tot	24	det	_	_
22	sea	sea	NOUN	NN	Number=Sing	23	compound	_	_
23	fish	fish	NOUN	NN	Number=Sing	24	compound	_	_
24	species	species	NOUN	NNS	Number=Plur	19	nmod	_	_
25	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cover** | present | Coral reefs | 1 per cent of the ocean floor |  |  |  |  | vn fill-9.8-1 «NP V NP»: agent=Theme cent=Destination |
| 2 | **is** | present | Coral reefs *not said here* |  |  |  |  | to a quarter; of all fish species; about, home *property* | tree rules |

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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:090-aquarium-the-coral-reef-tank.lesson:4`.

**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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