---
title: A firework is a very fast chemical reaction that makes hot gases, li… — Changes you can undo and changes you can't · tree and pragmatics
description: A firework is a very fast chemical reaction that makes hot gases, light, heat, noise and smoke. Who acts: firework, fast chemical reaction. A sentence of the lesson «Changes you can undo and changes you can't» of the chemistry course of Mova's primary school with its dependency tree and the pragmati
---

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# Changes you can undo and changes you can't, sentence 13

<!-- .ven lang=en -->
A firework is a very fast chemical reaction that makes hot gases, light, heat, noise and smoke.

<!-- .vintro -->
**Who acts:** firework, fast chemical reaction · **What happens:** be, make · **To what, where:** fast chemical reaction, hot gases

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This is a sentence of the lesson «Changes you can undo and changes you can't» 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 (firework, fast chemical reaction), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:009-changes-you-can-and-cannot-undo.lesson:13
# text = A firework is a very fast chemical reaction that makes hot gases, light, heat, noise and smoke.
# source = school lesson (ours)
# course = chemistry
# lesson = 009-changes-you-can-and-cannot-undo.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	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	firework	firework	NOUN	NN	Number=Sing	8	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
5	very	very	ADV	RB	_	6	advmod	_	_
6	fast	fast	ADJ	JJ	Degree=Pos	8	amod	_	_
7	chemical	chemical	ADJ	JJ	Degree=Pos	8	amod	_	_
8	reaction	reaction	NOUN	NN	Number=Sing	0	root	_	_
9	that	that	PRON	WDT	PronType=Rel	10	nsubj	_	_
10	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	acl:relcl	_	_
11	hot	hot	ADJ	JJ	Degree=Pos	12	amod	_	_
12	gases	gas	NOUN	NNS	Number=Plur	10	obj	_	_
13	,	,	PUNCT	,	_	14	punct	_	_
14	light	light	NOUN	NN	Number=Sing	12	conj	_	_
15	,	,	PUNCT	,	_	16	punct	_	_
16	heat	heat	NOUN	NN	Number=Sing	12	conj	_	_
17	,	,	PUNCT	,	_	18	punct	_	_
18	noise	noise	NOUN	NN	Number=Sing	12	conj	_	_
19	and	and	CCONJ	CC	_	20	cc	_	_
20	smoke	smoke	NOUN	NN	Number=Sing	12	conj	_	_
21	.	.	PUNCT	.	_	8	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 | **is a** | present | a firework | a fast chemical reaction |  |  |  |  | tree rules |
| 2 | **make** | present | a fast chemical reaction | hot gases and light and heat and noise and smoke |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset gas=Product |

<!-- .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:009-changes-you-can-and-cannot-undo.lesson:13`.

**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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- ← previous: [Changes you can undo and changes you c…, 12](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/9-changes-you-can-and-cannot-undo/12/)
- next →: [Changes you can undo and changes you c…, 14](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/9-changes-you-can-and-cannot-undo/14/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/9-changes-you-can-and-cannot-undo/)