---
title: Yet when the world agreed to act, the ozone layer began to heal. — The air we breathe · tree and pragmatics
description: Yet when the world agreed to act, the ozone layer began to heal. Who acts: world, ozone layer. A sentence of the lesson «The air we breathe» of the chemistry course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# The air we breathe, sentence 6

<!-- .ven lang=en -->
Yet when the world agreed to act, the ozone layer began to heal.

<!-- .vintro -->
**Who acts:** world, ozone layer · **What happens:** agree, act, begin, heal

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This is a sentence of the lesson «The air we breathe» of the chemistry 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 (world, ozone layer), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:033-the-air-we-breathe.lesson:6
# text = Yet when the world agreed to act, the ozone layer began to heal.
# source = school lesson (ours)
# course = chemistry
# lesson = 033-the-air-we-breathe.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	Yet	yet	CCONJ	CC	_	12	cc	_	_
2	when	when	ADV	WRB	PronType=Int	5	advmod	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	world	world	NOUN	NN	Number=Sing	5	nsubj	_	_
5	agreed	agree	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	12	advcl	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	act	act	VERB	VB	VerbForm=Inf	5	xcomp	_	_
8	,	,	PUNCT	,	_	5	punct	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	ozone	ozone	NOUN	NN	Number=Sing	11	compound	_	_
11	layer	layer	NOUN	NN	Number=Sing	12	nsubj	_	_
12	began	begin	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
13	to	to	PART	TO	_	14	mark	_	_
14	heal	heal	VERB	VB	VerbForm=Inf	12	xcomp	_	_
15	.	.	PUNCT	.	_	12	punct	_	_
```

## Pragmatics {#pragmatics}

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- 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 | **agree** *speech: agree* | past | the world |  |  |  |  |  | vn correspond-36.1-1 «NP V what S\_INF»: agent=Agent clause=Topic |
| 2 | **act** *not said to happen* | to-infinitive | the world *not said here* |  |  |  |  |  | vn act-114-1-1 «NP V»: agent=Agent |
| 3 | **begin** | past | the ozone layer |  |  |  |  |  | vn begin-55.1-1-1 «NP V S\_INF»: agent=Agent clause=Eventuality |
| 4 | **heal** | to-infinitive | the ozone layer *not said here* |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

<!-- .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:chemistry:033-the-air-we-breathe.lesson:6`.

**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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