---
title: In the Sun's core, hydrogen nuclei are squeezed together to make hel… — The Sun, our star · tree and pragmatics
description: In the Sun's core, hydrogen nuclei are squeezed together to make helium, and this nuclear fusion releases the energy that makes the Sun shine. Who acts: nuclear fusion, energy, Sun. A sentence of the lesson «The Sun, our star» of the space course of Mova's primary school with its dependency tree and
---

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# The Sun, our star, sentence 9

<!-- .ven lang=en -->
In the Sun's core, hydrogen nuclei are squeezed together to make helium, and this nuclear fusion releases the energy that makes the Sun shine.

<!-- .vintro -->
**Who acts:** nuclear fusion, energy, Sun · **What happens:** squeeze, make, release, shine · **To what, where:** hydrogen nuclei, core, helium, energy

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This is a sentence of the lesson «The Sun, our star» 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 (nuclear fusion, energy, Sun), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:space:001-the-sun-our-star.lesson:9
# text = In the Sun's core, hydrogen nuclei are squeezed together to make helium, and this nuclear fusion releases the energy that makes the Sun shine.
# source = school lesson (ours)
# course = space
# lesson = 001-the-sun-our-star.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	In	in	ADP	IN	_	5	case	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	Sun	Sun	PROPN	NNP	Number=Sing	5	nmod:poss	_	_
4	's	's	PART	POS	_	3	case	_	_
5	core	core	NOUN	NN	Number=Sing	10	obl	_	_
6	,	,	PUNCT	,	_	5	punct	_	_
7	hydrogen	hydrogen	NOUN	NN	Number=Sing	8	compound	_	_
8	nuclei	nucleus	NOUN	NNS	Number=Plur	10	nsubj	_	_
9	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	10	aux:pass	_	_
10	squeezed	squeeze	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
11	together	together	ADV	RB	_	10	advmod	_	_
12	to	to	PART	TO	_	13	mark	_	_
13	make	make	VERB	VB	VerbForm=Inf	10	advcl	_	_
14	helium	helium	NOUN	NN	Number=Sing	13	obj	_	_
15	,	,	PUNCT	,	_	20	punct	_	_
16	and	and	CCONJ	CC	_	20	cc	_	_
17	this	this	DET	DT	Number=Sing|PronType=Dem	19	det	_	_
18	nuclear	nuclear	ADJ	JJ	Degree=Pos	19	amod	_	_
19	fusion	fusion	NOUN	NN	Number=Sing	20	nsubj	_	_
20	releases	release	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	conj	_	_
21	the	the	DET	DT	Definite=Def|PronType=Art	22	det	_	_
22	energy	energy	NOUN	NN	Number=Sing	20	obj	_	_
23	that	that	PRON	WDT	PronType=Rel	24	nsubj	_	_
24	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	22	acl:relcl	_	_
25	the	the	DET	DT	Definite=Def|PronType=Art	26	det	_	_
26	Sun	Sun	PROPN	NNP	Number=Sing	27	nsubj	_	_
27	shine	shine	VERB	VB	VerbForm=Inf	24	xcomp	_	_
28	.	.	PUNCT	.	_	10	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **squeeze** | present · passive |  | hydrogen nuclei |  | the Sun's core |  | together *property* | vn funnel-9.3-1-1 «NP V NP PP.trajectory»: subject=Theme in core=Trajectory |
| 2 | **make** | to-infinitive |  | helium |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset helium=Product |
| 3 | **release** | present | this nuclear fusion | the energy |  |  |  |  | vn free-10.6.3-1 «NP V NP S\_ING»: agent=Causer energy=Source |
| 4 | **make** | present | the energy |  |  |  |  |  | tree rules |
| 5 | **shine** | infinitive | the Sun |  |  |  |  |  | vn light\_emission-43.1 «NP.location V PP.theme»: agent=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:space:001-the-sun-our-star.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): 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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