---
title: A fire needs three things: heat, fuel and oxygen from the air. — Thinking it through: the science behind home saf… · tree and pragmatics
description: A fire needs three things: heat, fuel and oxygen from the air. Who acts: fire. A sentence of the lesson «Thinking it through: the science behind home safety» of the everyday course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Thinking it through: the science behind home safety, sentence 1

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A fire needs three things: heat, fuel and oxygen from the air.

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**Who acts:** fire · **What happens:** need · **To what, where:** three things

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This is a sentence of the lesson «Thinking it through: the science behind home safety» of the everyday 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 (fire), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:040-home-safety-reasoning.lesson:1
# text = A fire needs three things: heat, fuel and oxygen from the air.
# source = school lesson (ours)
# course = everyday
# lesson = 040-home-safety-reasoning.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	fire	fire	NOUN	NN	Number=Sing	3	nsubj	_	_
3	needs	need	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	three	three	NUM	CD	NumForm=Word|NumType=Card	5	nummod	_	_
5	things	thing	NOUN	NNS	Number=Plur	3	obj	_	_
6	:	:	PUNCT	:	_	7	punct	_	_
7	heat	heat	NOUN	NN	Number=Sing	5	appos	_	_
8	,	,	PUNCT	,	_	9	punct	_	_
9	fuel	fuel	NOUN	NN	Number=Sing	7	conj	_	_
10	and	and	CCONJ	CC	_	11	cc	_	_
11	oxygen	oxygen	NOUN	NN	Number=Sing	7	conj	_	_
12	from	from	ADP	IN	_	14	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	air	air	NOUN	NN	Number=Sing	11	nmod	_	_
15	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | a fire | three things |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot thing=Theme |

<!-- .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:everyday:040-home-safety-reasoning.lesson:1`.

**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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