---
title: We need oxygen to release energy from our food. — Air and why we need it · tree and pragmatics
description: We need oxygen to release energy from our food. Who acts: We. A sentence of the lesson «Air and why we need it» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Air and why we need it, sentence 9

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We need oxygen to release energy from our food.

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**Who acts:** We · **What happens:** need, release · **To what, where:** oxygen, energy, food

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This is a sentence of the lesson «Air and why we need it» of the world 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 (We), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:017-air-oxygen-carbon-dioxide.lesson:9
# text = We need oxygen to release energy from our food.
# source = school lesson (ours)
# course = world
# lesson = 017-air-oxygen-carbon-dioxide.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	We	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	2	nsubj	_	_
2	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
3	oxygen	oxygen	NOUN	NN	Number=Sing	2	obj	_	_
4	to	to	PART	TO	_	5	mark	_	_
5	release	release	VERB	VB	VerbForm=Inf	3	acl	_	_
6	energy	energy	NOUN	NN	Number=Sing	5	obj	_	_
7	from	from	ADP	IN	_	9	case	_	_
8	our	our	PRON	PRP$	Case=Gen|Number=Plur|Person=1|Poss=Yes|PronType=Prs	9	nmod:poss	_	_
9	food	food	NOUN	NN	Number=Sing	5	obl	_	_
10	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: changed act=assert

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | We | oxygen |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot oxygen=Theme |
| 2 | **release** | to-infinitive | We *not said here* | energy |  | our food |  |  | vn free-10.6.3-1 «NP V NP S\_ING»: agent=Causer energy=Source |

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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:world:017-air-oxygen-carbon-dioxide.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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