---
title: Which is true about natural gas? — Smells that warn · tree and pragmatics
description: Which is true about natural gas? Test 2 · ★ of lesson 13 «Smells that warn» of the everyday 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/everyday/13-smells-that-warn/t2/)

<!-- 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/) / [Everyday](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/) / [Smells that warn](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/13-smells-that-warn/) / t2

# Test 2 · ★ · Smells that warn

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

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

<!-- .vabout -->
This is test 2 · ★ of lesson 13 «Smells that warn» of the everyday 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/everyday/13-smells-that-warn/#t2).

## The question {#question}

```conllu
# sent_id = question:everyday:13-smells-that-warn:t2:1
# text = Which is true about natural gas?
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	_	_
4	about	about	ADP	IN	_	6	case	_	_
5	natural	natural	ADJ	JJ	Degree=Pos	6	amod	_	_
6	gas	gas	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
7	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present |  |  |  |  |  | about natural gas; 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 -->
It smells of rotten eggs all by itself, straight from the ground

```conllu
# sent_id = question:everyday:13-smells-that-warn:t2:o1:1
# text = It smells of rotten eggs all by itself, straight from the ground
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	smells	smell	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	rotten	rotten	ADJ	JJ	Degree=Pos	5	amod	_	_
5	eggs	egg	NOUN	NNS	Number=Plur	2	obl	_	_
6	all	all	ADV	RB	_	8	advmod	_	_
7	by	by	ADP	IN	_	8	case	_	_
8	itself	itself	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs|Reflex=Yes	2	obl	_	SpaceAfter=No
9	,	,	PUNCT	,	_	13	punct	_	_
10	straight	straight	ADV	RB	_	13	advmod	_	_
11	from	from	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	ground	ground	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **smell** | present | It |  |  | the ground |  | of rotten eggs; by itself *= it* | vn smell\_emission-43.3 «NP V PP.theme»: agent=Location of egg=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
It smells sweet, like flowers

```conllu
# sent_id = question:everyday:13-smells-that-warn:t2:o2:1
# text = It smells sweet, like flowers
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	smells	smell	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	sweet	sweet	ADJ	JJ	Degree=Pos	2	xcomp	_	SpaceAfter=No
4	,	,	PUNCT	,	_	6	punct	_	_
5	like	like	ADP	IN	_	6	case	_	_
6	flowers	flower	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **smell** | present | It |  |  |  |  | like flowers; sweet *property* | vn stimulus\_subject-30.4 «NP V ADJ»: agent=Stimulus |

### Option 3 {#o3}

<!-- .ven lang=en -->
Only dogs are able to smell it

```conllu
# sent_id = question:everyday:13-smells-that-warn:t2:o3:1
# text = Only dogs are able to smell it
1	Only	only	ADV	RB	_	2	advmod	_	_
2	dogs	dog	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	able	able	ADJ	JJ	Degree=Pos	0	root	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	smell	smell	VERB	VB	VerbForm=Inf	4	xcomp	_	_
7	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	6	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | dogs |  |  |  |  | able *property* | tree rules |
| 2 | **smell** | to-infinitive | dogs *not said here* | it |  |  |  |  | vn see-30.1 «NP V NP»: agent=Experiencer it=Stimulus |

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

<!-- .ven lang=en -->
It has no smell until a smelly chemical is added

```conllu
# sent_id = question:everyday:13-smells-that-warn:t2:o4:1
# text = It has no smell until a smelly chemical is added
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	no	no	DET	DT	PronType=Neg	4	det	_	_
4	smell	smell	NOUN	NN	Number=Sing	2	obj	_	_
5	until	until	SCONJ	IN	_	10	mark	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	smelly	smelly	ADJ	JJ	Degree=Pos	8	amod	_	_
8	chemical	chemical	NOUN	NN	Number=Sing	10	nsubj:pass	_	_
9	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	aux:pass	_	_
10	added	add	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | It | no smell |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent smell=Patient |
| 2 | **add** *speech: assert* | present · passive |  | a smelly chemical |  |  |  |  | vn mix-22.1-2 «NP V NP»: subject=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: [Smells that warn, test 1](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/13-smells-that-warn/t1/)
- next →: [Smells that warn, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/13-smells-that-warn/t3/)
- ↑ back to [Smells that warn](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/13-smells-that-warn/)