---
title: Which of the following statements most accurately characterises the… — Escalators and lifts · tree and pragmatics
description: Which of the following statements most accurately characterises the function of the brushes affixed to the sides of an escalator? Exam question 1 of lesson 26 «Escalators and lifts» of the technology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each
---

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# Exam question 1 · Escalators and lifts

<!-- .ven lang=en -->
Which of the following statements most accurately characterises the function of the brushes affixed to the sides of an escalator?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **What happens:** follow, characteris, affix · **To what, where:** function, brushes

<!-- .vabout -->
This is exam question 1 of lesson 26 «Escalators and lifts» of the technology 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/technology/26-escalators-and-lifts/#e1).

## The question {#question}

```conllu
# sent_id = question:technology:26-escalators-and-lifts:e1:1
# text = Which of the following statements most accurately characterises the function of the brushes affixed to the sides of an escalator?
1	Which	which	PRON	WDT	PronType=Rel	8	nsubj	_	_
2	of	of	ADP	IN	_	5	case	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	following	follow	VERB	VBG	VerbForm=Ger	5	amod	_	_
5	statements	statement	NOUN	NNS	Number=Plur	8	obl	_	_
6	most	most	ADV	RBS	Degree=Sup	7	advmod	_	_
7	accurately	accurately	ADV	RB	_	8	advmod	_	_
8	characterises	characteris	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	function	function	NOUN	NN	Number=Sing	8	obj	_	_
11	of	of	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	brushes	brush	NOUN	NNS	Number=Plur	10	nmod	_	_
14	affixed	affix	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	13	acl	_	_
15	to	to	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	sides	side	NOUN	NNS	Number=Plur	14	obl	_	_
18	of	of	ADP	IN	_	20	case	_	_
19	an	a	DET	DT	Definite=Ind|PronType=Art	20	det	_	_
20	escalator	escalator	NOUN	NN	Number=Sing	17	nmod	_	SpaceAfter=No
21	?	?	PUNCT	.	_	8	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **follow** | gerund |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **characteris** | present |  | the function of the brushes |  |  |  | of the following statements; accurately *property* | tree rules |
| 3 | **affix** | participle |  | the brushes *not said here* |  |  |  | to the sides of a escalator | vn tape-22.4 «NP V ADV-Middle PP»: agent=Patient to side=Co-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 {#o1}

<!-- .ven lang=en -->
They are provided for the cleaning of passengers' footwear

```conllu
# sent_id = question:technology:26-escalators-and-lifts:e1:o1:1
# text = They are provided for the cleaning of passengers' footwear
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	provided	provide	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	for	for	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	cleaning	cleaning	NOUN	NN	Number=Sing	3	obl	_	_
7	of	of	ADP	IN	_	10	case	_	_
8	passengers	passenger	NOUN	NNS	Number=Plur	10	nmod:poss	_	SpaceAfter=No
9	'	's	PART	POS	_	8	case	_	_
10	footwear	footwear	NOUN	NN	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **provide** | present · passive |  | They |  |  |  | for the cleaning of passengers's footwear | vn ensure-99 «NP V NP PP.beneficiary»: subject=Theme for cleaning=Beneficiary |
| 2 | **clean** |  | passengers's footwear |  |  |  |  |  | nom cleaning «act intransitive»: of=agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
They serve to warm the steps in winter

```conllu
# sent_id = question:technology:26-escalators-and-lifts:e1:o2:1
# text = They serve to warm the steps in winter
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	serve	serve	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	to	to	PART	TO	_	4	mark	_	_
4	warm	warm	VERB	VB	VerbForm=Inf	2	xcomp	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	steps	step	NOUN	NNS	Number=Plur	4	obj	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	winter	winter	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **serve** | present | They |  |  |  |  |  | tree rules |
| 2 | **warm** | to-infinitive | They *not said here* | the steps |  |  | winter |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent step=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
They are intended to collect coins and small objects

```conllu
# sent_id = question:technology:26-escalators-and-lifts:e1:o3:1
# text = They are intended to collect coins and small objects
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj:pass	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	intended	intend	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	to	to	PART	TO	_	5	mark	_	_
5	collect	collect	VERB	VB	VerbForm=Inf	3	xcomp	_	_
6	coins	coin	NOUN	NNS	Number=Plur	5	obj	_	_
7	and	and	CCONJ	CC	_	9	cc	_	_
8	small	small	ADJ	JJ	Degree=Pos	9	amod	_	_
9	objects	object	NOUN	NNS	Number=Plur	6	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **intend** | present · passive |  | They |  |  |  |  | tree rules |
| 2 | **collect** *not said to happen* | to-infinitive |  | coins and small objects |  |  |  |  | vn obtain-13.5.2 «NP V NP»: agent=Agent coin=Theme |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
They serve to remind passengers to keep their feet clear of the gap between the steps and the side

<!-- fold The tree, 19 words -->
```conllu
# sent_id = question:technology:26-escalators-and-lifts:e1:o4:1
# text = They serve to remind passengers to keep their feet clear of the gap between the steps and the side
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	serve	serve	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	to	to	PART	TO	_	4	mark	_	_
4	remind	remind	VERB	VB	VerbForm=Inf	2	advcl	_	_
5	passengers	passenger	NOUN	NNS	Number=Plur	4	obj	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	keep	keep	VERB	VB	VerbForm=Inf	4	xcomp	_	_
8	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	9	nmod:poss	_	_
9	feet	foot	NOUN	NNS	Number=Plur	7	obj	_	_
10	clear	clear	ADJ	JJ	Degree=Pos	7	xcomp	_	_
11	of	of	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	gap	gap	NOUN	NN	Number=Sing	10	obl	_	_
14	between	between	ADP	IN	_	16	case	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	steps	step	NOUN	NNS	Number=Plur	13	nmod	_	_
17	and	and	CCONJ	CC	_	19	cc	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
19	side	side	NOUN	NN	Number=Sing	16	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **serve** | present | They |  |  |  |  |  | vn masquerade-29.6-2 «NP V PP.attribute»: agent=Agent |
| 2 | **remind** *speech: other* | to-infinitive | They *not said here* |  | passengers |  |  |  | vn tell-37.2 «NP V NP.recipient S»: agent=Agent passenger=Recipient clause=Topic |
| 3 | **keep** | to-infinitive | They *not said here* | passengers's feet |  |  |  | clear *property* | vn keep-15.2 «NP V NP»: agent=Agent foot=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.

<!-- /div -->

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