---
title: Fire needs fuel, heat and oxygen; a candle under a jar goes out when… — Olympiad: everyday chemistry detectives ★★★ · tree and pragmatics
description: Fire needs fuel, heat and oxygen; a candle under a jar goes out when the oxygen runs low, so a bigger jar keeps it burning longer. Who acts: Fire, candle, oxygen, bigger jar. A sentence of the lesson «Olympiad: everyday chemistry detectives ★★★» of the chemistry course of Mova's primary school with 
---

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# Olympiad: everyday chemistry detectives ★★★, sentence 10

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Fire needs fuel, heat and oxygen; a candle under a jar goes out when the oxygen runs low, so a bigger jar keeps it burning longer.

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**Who acts:** Fire, candle, oxygen, bigger jar · **What happens:** need, go out, run, keep, burn · **To what, where:** fuel, oxygen

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This is a sentence of the lesson «Olympiad: everyday chemistry detectives ★★★» 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 (Fire, candle, oxygen, bigger jar), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:037-olympiad-everyday-chemistry-detectives.lesson:10
# text = Fire needs fuel, heat and oxygen; a candle under a jar goes out when the oxygen runs low, so a bigger jar keeps it burning longer.
# source = school lesson (ours)
# course = chemistry
# lesson = 037-olympiad-everyday-chemistry-detectives.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): R2-punct-next ×1, R5-strong ×1, R7-rel-agree ×2, R8-pos-agree ×1
1	Fire	fire	NOUN	NN	Number=Sing	2	nsubj	_	Agree=R8-pos-agree|Haiku=2:nsubj|HaikuPos=PROPN:NNP:Number=Sing
2	needs	need	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	fuel	fuel	NOUN	NN	Number=Sing	2	obj	_	_
4	,	,	PUNCT	,	_	5	punct	_	_
5	heat	heat	NOUN	NN	Number=Sing	3	conj	_	Agree=R7-rel-agree|Haiku=3:appos
6	and	and	CCONJ	CC	_	7	cc	_	_
7	oxygen	oxygen	NOUN	NN	Number=Sing	5	conj	_	_
8	;	;	PUNCT	:	_	14	punct	_	Agree=R2-punct-next|Haiku=2:punct
9	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
10	candle	candle	NOUN	NN	Number=Sing	14	nsubj	_	_
11	under	under	ADP	IN	_	13	case	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	jar	jar	NOUN	NN	Number=Sing	10	nmod	_	Agree=R5-strong|Haiku=14:obl
14	goes	go	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	parataxis	_	Agree=R7-rel-agree|Haiku=2:conj
15	out	out	ADP	RP	_	14	compound:prt	_	_
16	when	when	ADV	WRB	PronType=Int	19	advmod	_	_
17	the	the	DET	DT	Definite=Def|PronType=Art	18	det	_	_
18	oxygen	oxygen	NOUN	NN	Number=Sing	19	nsubj	_	_
19	runs	run	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	advcl	_	_
20	low	low	ADJ	JJ	Degree=Pos	19	xcomp	_	_
21	,	,	PUNCT	,	_	26	punct	_	_
22	so	so	ADV	RB	_	26	advmod	_	_
23	a	a	DET	DT	Definite=Ind|PronType=Art	25	det	_	_
24	bigger	big	ADJ	JJR	Degree=Cmp	25	amod	_	_
25	jar	jar	NOUN	NN	Number=Sing	26	nsubj	_	_
26	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
27	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	26	obj	_	_
28	burning	burn	VERB	VBG	Tense=Pres|VerbForm=Part	26	xcomp	_	_
29	longer	long	ADV	RBR	Degree=Cmp	28	advmod	_	_
30	.	.	PUNCT	.	_	2	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 | **need** | present | Fire | fuel and heat and oxygen |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot fuel=Theme |
| 2 | **go out** | present | a candle under a jar |  |  |  |  |  | vn interact-36.6 «NP V»: agent=Agent |
| 3 | **run** | present | the oxygen |  |  |  |  | low *property* | vn run-51.3.2-2-1 «NP V»: agent=Theme |
| 4 | **keep** | present | a bigger jar | oxygen |  |  |  |  | tree rules |
| 5 | **burn** | gerund | oxygen *not said here* |  |  |  |  | long *property* | vn light\_emission-43.1 «NP V»: agent=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:chemistry:037-olympiad-everyday-chemistry-detectives.lesson:10`.

**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): R2-punct-next ×1, R5-strong ×1, R7-rel-agree ×2, R8-pos-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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