---
title: An airbag fills with gas in a split second and slows your head more… — Seat belts, crashes and keeping safe · tree and pragmatics
description: An airbag fills with gas in a split second and slows your head more gently than the hard wheel; small children must not sit in front of an airbag. Who acts: airbag, small children. A sentence of the lesson «Seat belts, crashes and keeping safe» of the physics course of Mova's primary school with its
---

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# Seat belts, crashes and keeping safe, sentence 9

<!-- .ven lang=en -->
An airbag fills with gas in a split second and slows your head more gently than the hard wheel; small children must not sit in front of an airbag.

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**Who acts:** airbag, small children · **What happens:** fill, slow, not sit · **To what, where:** split, head, front

<!-- .vabout -->
This is a sentence of the lesson «Seat belts, crashes and keeping safe» of the physics 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 (airbag, small children), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:037-seat-belts-crashes-and-keeping-safe.lesson:9
# text = An airbag fills with gas in a split second and slows your head more gently than the hard wheel; small children must not sit in front of an airbag.
# source = school lesson (ours)
# course = physics
# lesson = 037-seat-belts-crashes-and-keeping-safe.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): R3-conj-first ×1, R5-strong ×1, R7-rel-agree ×1
1	An	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	airbag	airbag	NOUN	NN	Number=Sing	3	nsubj	_	_
3	fills	fill	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	with	with	ADP	IN	_	5	case	_	_
5	gas	gas	NOUN	NN	Number=Sing	3	obl	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	Agree=R5-strong|Haiku=8:det
8	split	split	NOUN	NN	Number=Sing	3	obl	_	_
9	second	second	NOUN	NN	Number=Sing	3	obl	_	Agree=R7-rel-agree|Haiku=3:advmod|HaikuPos=ADV:RB:NumForm=Word|NumType=Ord
10	and	and	CCONJ	CC	_	11	cc	_	_
11	slows	slow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
12	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	13	nmod:poss	_	_
13	head	head	NOUN	NN	Number=Sing	11	obj	_	_
14	more	more	ADV	RBR	Degree=Cmp	15	advmod	_	_
15	gently	gently	ADV	RB	_	11	advmod	_	_
16	than	than	ADP	IN	_	19	case	_	_
17	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
18	hard	hard	ADJ	JJ	Degree=Pos	19	amod	_	_
19	wheel	wheel	NOUN	NN	Number=Sing	15	obl	_	_
20	;	;	PUNCT	:	_	25	punct	_	_
21	small	small	ADJ	JJ	Degree=Pos	22	amod	_	_
22	children	child	NOUN	NNS	Number=Plur	25	nsubj	_	_
23	must	must	AUX	MD	VerbForm=Fin	25	aux	_	_
24	not	not	PART	RB	Polarity=Neg	25	advmod	_	_
25	sit	sit	VERB	VB	VerbForm=Inf	3	conj	_	Agree=R3-conj-first|Haiku=11:conj
26	in	in	ADP	IN	_	27	case	_	_
27	front	front	NOUN	NN	Number=Sing	25	obl	_	_
28	of	of	ADP	IN	_	30	case	_	_
29	an	a	DET	DT	Definite=Ind|PronType=Art	30	det	_	_
30	airbag	airbag	NOUN	NN	Number=Sing	27	nmod	_	_
31	.	.	PUNCT	.	_	3	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 | **fill** | present | a airbag |  |  | split | second | with gas | vn other\_cos-45.4 «NP V NP PP.instrument»: agent=Agent with gas=Instrument |
| 2 | **slow** | present | a airbag *not said here* | your head |  |  |  | gently *property* | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent head=Patient |
| 3 | **not** **sit** | must | small children |  |  | front of a airbag |  |  | vn assuming\_position-50 «NP V PP.location»: agent=Agent in front=Location |

<!-- .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:physics:037-seat-belts-crashes-and-keeping-safe.lesson:9`.

**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): R3-conj-first ×1, R5-strong ×1, 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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