---
title: Identify the principal cause of fires occurring at fuel pumps, as as… — Petrol stations, pools and things that… · tree and pragmatics
description: Identify the principal cause of fires occurring at fuel pumps, as ascertained from investigations. Exam question 1 of lesson 23 «Petrol stations, pools and things that go bang» of the myths course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; M
---

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# Exam question 1 · Petrol stations, pools and things that go bang

<!-- .ven lang=en -->
Identify the principal cause of fires occurring at fuel pumps, as ascertained from investigations.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, fires · **What happens:** identify, occur, ascertain, cause · **To what, where:** principal cause, fuel pumps, investigations, fires

<!-- .vabout -->
This is exam question 1 of lesson 23 «Petrol stations, pools and things that go bang» of the myths 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/myths/23-petrol-stations-pools-and-things-that-go-bang/#e1).

## The question {#question}

```conllu
# sent_id = question:myths:23-petrol-stations-pools-and-things-that-go-bang:e1:1
# text = Identify the principal cause of fires occurring at fuel pumps, as ascertained from investigations.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	cause	cause	NOUN	NN	Number=Sing	1	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	fires	fire	NOUN	NNS	Number=Plur	4	nmod	_	_
7	occurring	occur	VERB	VBG	VerbForm=Ger	6	acl	_	_
8	at	at	ADP	IN	_	10	case	_	_
9	fuel	fuel	NOUN	NN	Number=Sing	10	compound	_	_
10	pumps	pump	NOUN	NNS	Number=Plur	7	obl	_	SpaceAfter=No
11	,	,	PUNCT	,	_	13	punct	_	_
12	as	as	SCONJ	IN	_	13	mark	_	_
13	ascertained	ascertain	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	1	parataxis	_	_
14	from	from	ADP	IN	_	15	case	_	_
15	investigations	investigation	NOUN	NNS	Number=Plur	13	obl	_	SpaceAfter=No
16	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal cause of fires |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent cause=Theme |
| 2 | **occur** | gerund | fires *not said here* |  |  | fuel pumps |  |  | vn occur-48.3-1 «NP V PP»: agent=Theme at pump=Location |
| 3 | **ascertain** | participle |  |  |  | investigations |  |  | vn discover-84 «NP V how S»: agent=Agent |
| 4 | **cause** |  |  | fires |  |  |  |  | nom cause «event transitive»: of=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.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The operation of mobile telephones

```conllu
# sent_id = question:myths:23-petrol-stations-pools-and-things-that-go-bang:e1:o1:1
# text = The operation of mobile telephones
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	operation	operation	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	mobile	mobile	ADJ	JJ	Degree=Pos	5	amod	_	_
5	telephones	telephone	NOUN	NNS	Number=Plur	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **operate** |  |  | mobile telephones |  |  |  |  | nom operation «state transitive»: of=patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
The heating of fuel by sunlight

```conllu
# sent_id = question:myths:23-petrol-stations-pools-and-things-that-go-bang:e1:o2:1
# text = The heating of fuel by sunlight
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	heating	heating	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	fuel	fuel	NOUN	NN	Number=Sing	2	nmod	_	_
5	by	by	ADP	IN	_	6	case	_	_
6	sunlight	sunlight	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **heat** |  | fuel |  |  |  |  |  | nom heating «process intransitive»: of=agent |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
The discharge of static electricity

```conllu
# sent_id = question:myths:23-petrol-stations-pools-and-things-that-go-bang:e1:o3:1
# text = The discharge of static electricity
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	discharge	discharge	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	static	static	ADJ	JJ	Degree=Pos	5	amod	_	_
5	electricity	electricity	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **discharge** |  |  | static electricity |  |  |  |  | nom discharge «event transitive»: of=patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The use of electric vehicle chargers nearby

```conllu
# sent_id = question:myths:23-petrol-stations-pools-and-things-that-go-bang:e1:o4:1
# text = The use of electric vehicle chargers nearby
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	use	use	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	6	case	_	_
4	electric	electric	ADJ	JJ	Degree=Pos	6	amod	_	_
5	vehicle	vehicle	NOUN	NN	Number=Sing	6	compound	_	_
6	chargers	charger	NOUN	NNS	Number=Plur	2	nmod	_	_
7	nearby	nearby	ADV	RB	_	6	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use** |  |  | electric vehicle chargers |  |  |  |  | nom use «act transitive»: of=patient |

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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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- next →: [Petrol stations, pools and things that…, exam 2](https://md.mova.elamur.ai/free/en/corpora/questions/myths/23-petrol-stations-pools-and-things-that-go-bang/e2/)
- ↑ back to [Petrol stations, pools and things that go bang](https://md.mova.elamur.ai/free/en/corpora/questions/myths/23-petrol-stations-pools-and-things-that-go-bang/)