---
title: Nan says she bought three houseplants "to clean all the air in the f… — The air we breathe · tree and pragmatics
description: Nan says she bought three houseplants "to clean all the air in the flat". What's true? Test 4 · ★★ of lesson 33 «The air we breathe» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/chemistry/33-the-air-we-breathe/t4/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Chemistry](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/) / [The air we breathe](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/33-the-air-we-breathe/) / t4

# Test 4 · ★★ · The air we breathe

<!-- .ven lang=en -->
Nan says she bought three houseplants "to clean all the air in the flat". What's true?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 1 · wrong ✗ · **Who acts:** Nan · **What happens:** say, buy, clean, be · **To what, where:** three houseplants, air, flat · **Speech:** someone speaks here

<!-- .vabout -->
This is test 4 · ★★ of lesson 33 «The air we breathe» of the chemistry 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/chemistry/33-the-air-we-breathe/#t4).

## The question {#question}

<!-- .note -->
*Sentence 1:* Nan says she bought three houseplants "to clean all the air in the flat".

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:t4:1
# text = Nan says she bought three houseplants "to clean all the air in the flat".
1	Nan	Nan	PROPN	NNP	Number=Sing	2	nsubj	_	_
2	says	say	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	she	she	PRON	PRP	Case=Nom|Gender=Fem|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
4	bought	buy	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	2	ccomp	_	_
5	three	three	NUM	CD	NumForm=Word|NumType=Card	6	nummod	_	_
6	houseplants	houseplant	NOUN	NNS	Number=Plur	4	obj	_	_
7	"	"	PUNCT	''	_	6	punct	_	SpaceAfter=No
8	to	to	PART	TO	_	9	mark	_	_
9	clean	clean	VERB	VB	VerbForm=Inf	4	advcl	_	_
10	all	all	DET	PDT	PronType=Tot	12	det:predet	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	air	air	NOUN	NN	Number=Sing	9	obj	_	_
13	in	in	ADP	IN	_	15	case	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	flat	flat	NOUN	NN	Number=Sing	9	obl	_	SpaceAfter=No
16	"	"	PUNCT	''	_	4	punct	_	SpaceAfter=No
17	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **say** *speech: assert* | present | Nan |  |  |  |  |  | vn say-37.7-1-1 «NP V that S»: agent=Agent clause=Topic |
| 2 | **buy** | past | Nan | three houseplants |  |  |  |  | vn accept-77.1 «NP V NP»: agent=Agent houseplant=Theme |
| 3 | **clean** *in a quote* | to-infinitive | Nan *not said here* | all air |  | the flat |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent air=Patient |

<!-- .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.

<!-- .note -->
*Sentence 2:* What's true?

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:t4:2
# text = What's true?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	SpaceAfter=No
2	's	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 |

## The options {#options}

### Option 1 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
A few plants do little; opening a window does more

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:t4:o1:1
# text = A few plants do little; opening a window does more
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	few	few	ADJ	JJ	Degree=Pos	3	amod	_	_
3	plants	plant	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	do	do	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	little	little	ADJ	JJ	Degree=Pos	4	obj	_	SpaceAfter=No
6	;	;	PUNCT	,	_	10	punct	_	_
7	opening	open	VERB	VBG	VerbForm=Ger	10	csubj	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	window	window	NOUN	NN	Number=Sing	7	obj	_	_
10	does	do	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	parataxis	_	_
11	more	more	ADV	RBR	Degree=Cmp	10	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **do** | present | a few plants | little |  |  |  |  | vn act-114-1 «NP V NP»: agent=Agent little=Eventuality |
| 2 | **open** | gerund |  | a window |  |  |  |  | vn spatial\_configuration-47.6-1 «PP.location V NP»: agent=Location window=Theme |
| 3 | **do** | present | opening |  |  |  |  |  | vn act-114-1 «NP V»: agent=Agent |

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
Three plants clean the air of a whole flat

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:t4:o2:1
# text = Three plants clean the air of a whole flat
1	Three	three	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	plants	plant	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	clean	clean	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	air	air	NOUN	NN	Number=Sing	3	obj	_	_
6	of	of	ADP	IN	_	9	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	whole	whole	ADJ	JJ	Degree=Pos	9	amod	_	_
9	flat	flat	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **clean** | present | Three plants | the air of a whole flat |  |  |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent air=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
Plants take oxygen out of the air

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:t4:o3:1
# text = Plants take oxygen out of the air
1	Plants	plant	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	take	take	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	oxygen	oxygen	NOUN	NN	Number=Sing	2	obj	_	_
4	out	out	ADP	IN	_	7	case	_	_
5	of	of	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	air	air	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **take** | present | Plants | oxygen |  | the air |  |  | vn bring-11.3 «NP V NP PP.initial\_location»: agent=Agent oxygen=Theme out air=Initial\_Location |

### Option 4 {#o4}

<!-- .ven lang=en -->
Plants only clean the air at night

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:t4:o4:1
# text = Plants only clean the air at night
1	Plants	plant	NOUN	NNS	Number=Plur	3	nsubj	_	_
2	only	only	ADV	RB	_	3	advmod	_	_
3	clean	clean	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	air	air	NOUN	NN	Number=Sing	3	obj	_	_
6	at	at	ADP	IN	_	7	case	_	_
7	night	night	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **clean** | present | Plants | the air |  |  | night |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent air=Patient |

<!-- div src -->

**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.

<!-- /div -->

<!-- pn -->
- ← previous: [The air we breathe, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/33-the-air-we-breathe/t3/)
- next →: [The air we breathe, test 5](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/33-the-air-we-breathe/t5/)
- ↑ back to [The air we breathe](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/33-the-air-we-breathe/)