---
title: Aquarium tunnels are made of acrylic many centimetres thick, strong… — The aquarium: the shark tunnel and the rays · tree and pragmatics
description: Aquarium tunnels are made of acrylic many centimetres thick, strong enough to hold back millions of litres of water. A sentence of the lesson «The aquarium: the shark tunnel and the rays» of the biology course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# The aquarium: the shark tunnel and the rays, sentence 5

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Aquarium tunnels are made of acrylic many centimetres thick, strong enough to hold back millions of litres of water.

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**What happens:** make, hold back · **To what, where:** Aquarium tunnels, millions

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This is a sentence of the lesson «The aquarium: the shark tunnel and the rays» 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: what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:091-the-aquarium-the-shark-tunnel-and-the-rays.lesson:5
# text = Aquarium tunnels are made of acrylic many centimetres thick, strong enough to hold back millions of litres of water.
# source = school lesson (ours)
# course = biology
# lesson = 091-the-aquarium-the-shark-tunnel-and-the-rays.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): R7-rel-agree ×1
1	Aquarium	aquarium	NOUN	NN	Number=Sing	2	compound	_	_
2	tunnels	tunnel	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	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	acrylic	acrylic	NOUN	NN	Number=Sing	4	obl	_	_
7	many	many	ADJ	JJ	Degree=Pos	8	amod	_	_
8	centimetres	centimetre	NOUN	NNS	Number=Plur	9	obl:unmarked	_	_
9	thick	thick	ADJ	JJ	Degree=Pos	4	xcomp	_	_
10	,	,	PUNCT	,	_	11	punct	_	_
11	strong	strong	ADJ	JJ	Degree=Pos	9	conj	_	_
12	enough	enough	ADV	RB	_	11	advmod	_	_
13	to	to	PART	TO	_	14	mark	_	_
14	hold	hold	VERB	VB	VerbForm=Inf	11	advcl	_	Agree=R7-rel-agree|Haiku=11:xcomp
15	back	back	ADP	RP	_	14	compound:prt	_	_
16	millions	million	NOUN	NNS	Number=Plur	14	obj	_	_
17	of	of	ADP	IN	_	18	case	_	_
18	litres	litre	NOUN	NNS	Number=Plur	16	nmod	_	_
19	of	of	ADP	IN	_	20	case	_	_
20	water	water	NOUN	NN	Number=Sing	18	nmod	_	_
21	.	.	PUNCT	.	_	4	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 | **make** | present · passive |  | Aquarium tunnels |  |  |  | of acrylic; thick *property* | vn build-26.1-1 «NP.asset V NP»: subject=Product |
| 2 | **hold back** | to-infinitive |  | millions of litres of water |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent million=Theme |

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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:091-the-aquarium-the-shark-tunnel-and-the-rays.lesson:5`.

**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): 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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