---
title: A star is a giant ball of hot gas, mostly hydrogen and helium, that… — Stars: what they are · tree and pragmatics
description: A star is a giant ball of hot gas, mostly hydrogen and helium, that makes its own light: deep in the Sun's core, at about 15 million °C, hydrogen is squeezed into helium and gives out enormous energy. Who acts: star, giant ball. A sentence of the lesson «Stars: what they are» of the space course of 
---

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# Stars: what they are, sentence 1

<!-- .ven lang=en -->
A star is a giant ball of hot gas, mostly hydrogen and helium, that makes its own light: deep in the Sun's core, at about 15 million °C, hydrogen is squeezed into helium and gives out enormous energy.

<!-- .vintro -->
**Who acts:** star, giant ball · **What happens:** be, make, squeeze, give out, light · **To what, where:** giant ball, own light, hydrogen, helium, enormous energy

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This is a sentence of the lesson «Stars: what they are» of the space 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 (star, giant ball), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:space:017-stars-what-they-are.lesson:1
# text = A star is a giant ball of hot gas, mostly hydrogen and helium, that makes its own light: deep in the Sun's core, at about 15 million °C, hydrogen is squeezed into helium and gives out enormous energy.
# source = school lesson (ours)
# course = space
# lesson = 017-stars-what-they-are.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 ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	star	star	NOUN	NN	Number=Sing	6	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	giant	giant	ADJ	JJ	Degree=Pos	6	amod	_	_
6	ball	ball	NOUN	NN	Number=Sing	0	root	_	_
7	of	of	ADP	IN	_	9	case	_	_
8	hot	hot	ADJ	JJ	Degree=Pos	9	amod	_	_
9	gas	gas	NOUN	NN	Number=Sing	6	nmod	_	_
10	,	,	PUNCT	,	_	12	punct	_	_
11	mostly	mostly	ADV	RB	_	12	advmod	_	_
12	hydrogen	hydrogen	NOUN	NN	Number=Sing	9	appos	_	_
13	and	and	CCONJ	CC	_	14	cc	_	_
14	helium	helium	NOUN	NN	Number=Sing	12	conj	_	_
15	,	,	PUNCT	,	_	17	punct	_	_
16	that	that	PRON	WDT	PronType=Rel	17	nsubj	_	_
17	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	acl:relcl	_	_
18	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	20	nmod:poss	_	_
19	own	own	ADJ	JJ	Degree=Pos	20	amod	_	_
20	light	light	NOUN	NN	Number=Sing	17	obj	_	_
21	:	:	PUNCT	:	_	22	punct	_	_
22	deep	deep	ADV	RB	_	17	parataxis	_	_
23	in	in	ADP	IN	_	27	case	_	_
24	the	the	DET	DT	Definite=Def|PronType=Art	25	det	_	_
25	Sun	Sun	PROPN	NNP	Number=Sing	27	nmod:poss	_	_
26	's	's	PART	POS	_	25	case	_	_
27	core	core	NOUN	NN	Number=Sing	22	obl	_	_
28	,	,	PUNCT	,	_	32	punct	_	_
29	at	at	ADP	IN	_	32	case	_	_
30	about	about	ADV	RB	_	32	advmod	_	Agree=R5-strong|Haiku=31:advmod
31	15	15	NUM	CD	NumForm=Digit|NumType=Card	32	compound	_	_
32	million	million	NUM	CD	NumForm=Word|NumType=Card	22	conj	_	_
33	°	°	SYM	SYM	_	34	case	_	_
34	C	C	PROPN	NNP	Number=Sing	32	nmod	_	_
35	,	,	PUNCT	,	_	38	punct	_	_
36	hydrogen	hydrogen	NOUN	NN	Number=Sing	38	nsubj:pass	_	_
37	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	38	aux:pass	_	_
38	squeezed	squeeze	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	22	conj	_	_
39	into	into	ADP	IN	_	40	case	_	_
40	helium	helium	NOUN	NN	Number=Sing	38	obl	_	_
41	and	and	CCONJ	CC	_	42	cc	_	_
42	gives	give	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	38	conj	_	_
43	out	out	ADV	RB	_	42	advmod	_	_
44	enormous	enormous	ADJ	JJ	Degree=Pos	45	amod	_	_
45	energy	energy	NOUN	NN	Number=Sing	42	obj	_	_
46	.	.	PUNCT	.	_	6	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 star | a giant ball |  |  |  | of hot gas | tree rules |
| 2 | **make** | present | a giant ball | star's own light |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset light=Product |
| 3 | **squeeze** | present · passive |  | hydrogen |  | helium |  |  | vn knead-26.5 «NP V NP.material PP.product»: subject=Material into helium=Product |
| 4 | **give out** | present |  | enormous energy |  |  |  | out *property* | vn contribute-13.2 «NP V NP.theme (PP)»: agent=Agent energy=Theme |
| 5 | **light** |  | star |  |  |  |  |  | nom light «phenomenon transitive»: poss=agent |

<!-- .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:space:017-stars-what-they-are.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): R5-strong ×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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