---
title: Which is true? — Lungs, air and keeping fit · tree and pragmatics
description: Which is true? Test 2 · ★ 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 wrong.
---

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# Test 2 · ★ · Lungs, air and keeping fit

<!-- .ven lang=en -->
Which is true?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **What happens:** be

<!-- .vabout -->
This is test 2 · ★ of lesson 93 «Lungs, air and keeping fit» of the world course of Mova's primary school. 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/#t2).

## The question {#question}

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:t2:1
# text = Which is true?
1	Which	which	PRON	WDT	PronType=Rel	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	true	true	ADJ	JJ	Degree=Pos	0	root	_	SpaceAfter=No
4	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present |  |  |  |  |  | true *property* | tree rules |

<!-- .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 {#o1}

<!-- .ven lang=en -->
We breathe out only carbon dioxide

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:t2:o1:1
# text = We breathe out only carbon dioxide
1	We	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	2	nsubj	_	_
2	breathe	breathe	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
3	out	out	ADP	RP	_	2	compound:prt	_	_
4	only	only	ADV	RB	_	6	advmod	_	_
5	carbon	carbon	NOUN	NN	Number=Sing	6	compound	_	_
6	dioxide	dioxide	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **breathe out** | present | We | carbon dioxide |  |  |  |  | vn breathe-40.1.2-1 «NP V NP»: agent=Agent dioxide=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
Nitrogen is what our cells need most

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:t2:o2:1
# text = Nitrogen is what our cells need most
1	Nitrogen	Nitrogen	PROPN	NNP	Number=Sing	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	what	what	PRON	WP	PronType=Int	0	root	_	_
4	our	our	PRON	PRP$	Case=Gen|Number=Plur|Person=1|Poss=Yes|PronType=Prs	5	nmod:poss	_	_
5	cells	cell	NOUN	NNS	Number=Plur	6	nsubj	_	_
6	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	acl:relcl	_	_
7	most	most	ADJ	JJS	Degree=Sup	3	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | Nitrogen |  |  |  |  | most *nmod* | tree rules |
| 2 | **need** | present | our cells |  |  |  |  |  | vn want-32.1-1-1 «NP V NP S\_INF»: agent=Pivot |

### Option 3 {#o3}

<!-- .ven lang=en -->
The air is mostly oxygen

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:t2:o3:1
# text = The air is mostly oxygen
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	air	air	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	mostly	mostly	ADV	RB	_	5	advmod	_	_
5	oxygen	oxygen	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | the air | oxygen |  |  |  | mostly *property* | tree rules |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
We breathe out some oxygen as well as carbon dioxide

```conllu
# sent_id = question:world:93-lungs-air-keeping-fit:t2:o4:1
# text = We breathe out some oxygen as well as carbon dioxide
1	We	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	2	nsubj	_	_
2	breathe	breathe	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
3	out	out	ADP	RP	_	2	compound:prt	_	_
4	some	some	DET	DT	PronType=Ind	5	det	_	_
5	oxygen	oxygen	NOUN	NN	Number=Sing	2	obj	_	_
6	as	as	ADV	RB	ExtPos=CCONJ	10	cc	_	_
7	well	well	ADV	RB	Degree=Pos	6	fixed	_	_
8	as	as	ADP	IN	_	6	fixed	_	_
9	carbon	carbon	NOUN	NN	Number=Sing	10	compound	_	_
10	dioxide	dioxide	NOUN	NN	Number=Sing	2	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **breathe out** | present | We | some oxygen |  |  |  |  | vn breathe-40.1.2-1 «NP V NP»: agent=Agent oxygen=Theme |

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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 1](https://md.mova.elamur.ai/free/en/corpora/questions/world/93-lungs-air-keeping-fit/t1/)
- next →: [Lungs, air and keeping fit, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/world/93-lungs-air-keeping-fit/t3/)
- ↑ back to [Lungs, air and keeping fit](https://md.mova.elamur.ai/free/en/corpora/questions/world/93-lungs-air-keeping-fit/)