---
title: A hot-air balloon rises because a burner heats the air inside it and… — Airports, the black box, helicopters and drones · tree and pragmatics
description: A hot-air balloon rises because a burner heats the air inside it and hot air is lighter than the cold air outside; the first people flew in one in Paris in 1783. Who acts: air balloon, burner, hot air, first people. A sentence of the lesson «Airports, the black box, helicopters and drones» of the te
---

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# Airports, the black box, helicopters and drones, sentence 17

<!-- .ven lang=en -->
A hot-air balloon rises because a burner heats the air inside it and hot air is lighter than the cold air outside; the first people flew in one in Paris in 1783.

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**Who acts:** air balloon, burner, hot air, first people · **What happens:** rise, heat, be, fly · **To what, where:** air, balloon, Paris

<!-- .vabout -->
This is a sentence of the lesson «Airports, the black box, helicopters and drones» of the technology 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 (air balloon, burner, hot air, first people), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:technology:023-airports-black-box-helicopters-drones.lesson:17
# text = A hot-air balloon rises because a burner heats the air inside it and hot air is lighter than the cold air outside; the first people flew in one in Paris in 1783.
# source = school lesson (ours)
# course = technology
# lesson = 023-airports-black-box-helicopters-drones.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): R5-strong ×5, R6-punct-agree ×1, R7-rel-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	Agree=R5-strong|Haiku=6:det
2	hot	hot	ADJ	JJ	Degree=Pos	4	amod	_	Agree=R5-strong|Haiku=6:amod
3	-	-	PUNCT	HYPH	_	2	punct	_	_
4	air	air	NOUN	NN	Number=Sing	5	compound	_	Agree=R5-strong|Haiku=6:compound
5	balloon	balloon	NOUN	NN	Number=Sing	6	nsubj	_	Agree=R7-rel-agree|Haiku=6:compound
6	rises	rise	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	because	because	SCONJ	IN	_	10	mark	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	burner	burner	NOUN	NN	Number=Sing	10	nsubj	_	_
10	heats	heat	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	advcl	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	air	air	NOUN	NN	Number=Sing	10	obj	_	_
13	inside	inside	ADP	IN	_	14	case	_	_
14	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	12	nmod	_	_
15	and	and	CCONJ	CC	_	19	cc	_	_
16	hot	hot	ADJ	JJ	Degree=Pos	17	amod	_	_
17	air	air	NOUN	NN	Number=Sing	19	nsubj	_	_
18	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	19	cop	_	_
19	lighter	light	ADJ	JJR	Degree=Cmp	10	conj	_	_
20	than	than	ADP	IN	_	23	case	_	_
21	the	the	DET	DT	Definite=Def|PronType=Art	23	det	_	_
22	cold	cold	ADJ	JJ	Degree=Pos	23	amod	_	_
23	air	air	NOUN	NN	Number=Sing	19	obl	_	_
24	outside	outside	ADV	RB	_	23	advmod	_	_
25	;	;	PUNCT	:	_	29	punct	_	_
26	the	the	DET	DT	Definite=Def|PronType=Art	28	det	_	_
27	first	first	ADJ	JJ	Degree=Pos|NumForm=Word|NumType=Ord	28	amod	_	_
28	people	people	NOUN	NNS	Number=Plur	29	nsubj	_	_
29	flew	fly	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	6	parataxis	_	_
30	in	in	ADP	IN	_	31	case	_	_
31	one	one	NUM	CD	NumForm=Word|NumType=Card	29	obl	_	_
32	in	in	ADP	IN	_	33	case	_	_
33	Paris	Paris	PROPN	NNP	Number=Sing	29	obl	_	Agree=R5-strong|Haiku=31:nmod
34	in	in	ADP	IN	_	35	case	_	_
35	1783	1783	NUM	CD	NumForm=Digit|NumType=Card	29	obl	_	Agree=R5-strong|Haiku=31:nmod
36	.	.	PUNCT	.	_	6	punct	_	Agree=R6-punct-agree|Haiku=29: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 | **rise** | present | a air balloon |  |  |  |  |  | vn assuming\_position-50 «NP V»: agent=Agent |
| 2 | **heat** | present | a burner | the air |  | balloon |  |  | vn cooking-45.3 «NP V NP.patient»: agent=Agent air=Patient |
| 3 | **is** | present | hot air |  |  |  |  | than the cold air; light *property* | tree rules |
| 4 | **fly** | past | the first people |  |  | Paris |  | in one; in 1783 | vn spatial\_configuration-47.6-1 «NP V NP.theme PP»: agent=Agent in one=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:technology:023-airports-black-box-helicopters-drones.lesson:17`.

**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): R5-strong ×5, R6-punct-agree ×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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