---
title: Ascertain the reason for which chlorine is placed in swimming pool w… — Cricket, rugby, basketball, hockey and… · tree and pragmatics
description: Ascertain the reason for which chlorine is placed in swimming pool water. Exam question 4 of lesson 249 «Cricket, rugby, basketball, hockey and swimming» 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 wro
---

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# Exam question 4 · Cricket, rugby, basketball, hockey and swimming

<!-- .ven lang=en -->
Ascertain the reason for which chlorine is placed in swimming pool water.

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you · **What happens:** ascertain, place · **To what, where:** reason, chlorine, pool water

<!-- .vabout -->
This is exam question 4 of lesson 249 «Cricket, rugby, basketball, hockey and swimming» of the everyday 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/everyday/249-cricket-rugby-basketball-and-hockey/#e4).

## The question {#question}

```conllu
# sent_id = question:everyday:249-cricket-rugby-basketball-and-hockey:e4:1
# text = Ascertain the reason for which chlorine is placed in swimming pool water.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	8	obl	_	_
6	chlorine	chlorine	NOUN	NN	Number=Sing	8	nsubj:pass	_	_
7	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	aux:pass	_	_
8	placed	place	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl:relcl	_	_
9	in	in	ADP	IN	_	12	case	_	_
10	swimming	swimming	NOUN	NN	Number=Sing	11	compound	_	_
11	pool	pool	NOUN	NN	Number=Sing	12	compound	_	_
12	water	water	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
13	.	.	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 reason |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent reason=Topic |
| 2 | **place** | present · passive |  | chlorine |  | pool water |  | for the reason | vn put-9.1-2 «NP V NP PP.destination»: subject=Theme in water=Destination |

<!-- .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 {#o1}

<!-- .ven lang=en -->
To warm the water

```conllu
# sent_id = question:everyday:249-cricket-rugby-basketball-and-hockey:e4:o1:1
# text = To warm the water
1	To	to	PART	TO	_	2	mark	_	_
2	warm	warm	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	water	water	NOUN	NN	Number=Sing	2	obj	_	_
```

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

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
To make the water blue

```conllu
# sent_id = question:everyday:249-cricket-rugby-basketball-and-hockey:e4:o2:1
# text = To make the water blue
1	To	to	PART	TO	_	2	mark	_	_
2	make	make	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	water	water	NOUN	NN	Number=Sing	2	obj	_	_
5	blue	blue	ADJ	JJ	Degree=Pos	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | to-infinitive |  | the water |  |  |  | blue *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset water=Product |

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

<!-- .ven lang=en -->
To kill germs

```conllu
# sent_id = question:everyday:249-cricket-rugby-basketball-and-hockey:e4:o3:1
# text = To kill germs
1	To	to	PART	TO	_	2	mark	_	_
2	kill	kill	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	germs	germ	NOUN	NNS	Number=Plur	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **kill** | to-infinitive |  | germs |  |  |  |  | vn remove-10.1 «NP V NP»: agent=Agent germ=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
To help swimmers float

```conllu
# sent_id = question:everyday:249-cricket-rugby-basketball-and-hockey:e4:o4:1
# text = To help swimmers float
1	To	to	PART	TO	_	2	mark	_	_
2	help	help	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	swimmers	swimmer	NOUN	NNS	Number=Plur	2	obj	_	_
4	float	float	VERB	VB	VerbForm=Inf	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | to-infinitive |  | swimmers |  |  |  |  | vn help-72.1-1-1 «NP V NP S\_INF»: agent=Agent swimmer=Beneficiary clause=Theme |
| 2 | **float** | infinitive | swimmers *not said here* |  |  |  |  |  | vn run-51.3.2-2 «NP V»: agent=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: [Cricket, rugby, basketball, hockey and…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/249-cricket-rugby-basketball-and-hockey/e3/)
- next →: [Gymnastics, trampolines, winter fun an…, test 1](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/250-gymnastics-winter-sports-and-fishing/t1/)
- ↑ back to [Cricket, rugby, basketball, hockey and swimming](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/249-cricket-rugby-basketball-and-hockey/)