---
title: Ascertain the proportion of oxygen in the air. — Lungs, air and keeping fit · tree and pragmatics
description: Ascertain the proportion of oxygen in the air. Exam question 1 of lesson 93 «Lungs, air and keeping fit» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Exam question 1 · Lungs, air and keeping fit

<!-- .ven lang=en -->
Ascertain the proportion of oxygen in the air.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you · **What happens:** ascertain · **To what, where:** proportion, air

<!-- .vabout -->
This is exam question 1 of lesson 93 «Lungs, air and keeping fit» of the world course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/world/93-lungs-air-keeping-fit/#e1).

## The question {#question}

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:e1:1
# text = Ascertain the proportion of oxygen in the air.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	proportion	proportion	NOUN	NN	Number=Sing	1	obj	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	oxygen	oxygen	NOUN	NN	Number=Sing	3	nmod	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	air	air	NOUN	NN	Number=Sing	1	obl	_	SpaceAfter=No
9	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the proportion of oxygen |  | the air |  |  | vn discover-84 «NP V NP»: agent=Agent proportion=Topic |

<!-- .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.

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
About one fifth

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:e1:o1:1
# text = About one fifth
1	About	about	ADV	RB	_	2	advmod	_	_
2	one	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	fifth	fifth	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 {#o2}

<!-- .ven lang=en -->
About four fifths

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:e1:o2:1
# text = About four fifths
1	About	about	ADV	RB	_	2	advmod	_	_
2	four	four	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	fifths	fifth	NOUN	NNS	Number=Plur	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 {#o3}

<!-- .ven lang=en -->
About one tenth

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:e1:o3:1
# text = About one tenth
1	About	about	ADV	RB	_	2	advmod	_	_
2	one	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	tenth	tenth	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
About one half

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:e1:o4:1
# text = About one half
1	About	about	ADV	RB	_	2	advmod	_	_
2	one	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	half	half	NOUN	NN	Number=Sing|NumForm=Word|NumType=Frac	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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- ← previous: [Lungs, air and keeping fit, test 13](https://md.mova.elamur.ai/free/en/corpora/questions/world/93-lungs-air-keeping-fit/t13/)
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