---
title: Identify the means by which a live bus-stop display ascertains the e… — Buses, trams, lorries and traffic lights · tree and pragmatics
description: Identify the means by which a live bus-stop display ascertains the expected time of arrival of a vehicle. Exam question 1 of lesson 20 «Buses, trams, lorries and traffic lights» of the technology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each opt
---

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# Exam question 1 · Buses, trams, lorries and traffic lights

<!-- .ven lang=en -->
Identify the means by which a live bus-stop display ascertains the expected time of arrival of a vehicle.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, the, live stop display, vehicle · **What happens:** identify, mean, ascertain, expect, arrive

<!-- .vabout -->
This is exam question 1 of lesson 20 «Buses, trams, lorries and traffic lights» 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/20-buses-trams-lorries-and-traffic-lights/#e1).

## The question {#question}

```conllu
# sent_id = question:technology:20-buses-trams-lorries-and-traffic-lights:e1:1
# text = Identify the means by which a live bus-stop display ascertains the expected time of arrival of a vehicle.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	nsubj	_	_
3	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	ccomp	_	_
4	by	by	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	12	obl	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
7	live	live	ADJ	JJ	Degree=Pos	11	amod	_	_
8	bus	bus	NOUN	NN	Number=Sing	10	compound	_	SpaceAfter=No
9	-	-	PUNCT	HYPH	_	8	punct	_	SpaceAfter=No
10	stop	stop	NOUN	NN	Number=Sing	11	compound	_	_
11	display	display	NOUN	NN	Number=Sing	12	nsubj	_	_
12	ascertains	ascertain	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	parataxis	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
14	expected	expect	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	15	amod	_	_
15	time	time	NOUN	NN	Number=Sing	12	obj	_	_
16	of	of	ADP	IN	_	17	case	_	_
17	arrival	arrival	NOUN	NN	Number=Sing	15	nmod	_	_
18	of	of	ADP	IN	_	20	case	_	_
19	a	a	DET	DT	Definite=Ind|PronType=Art	20	det	_	_
20	vehicle	vehicle	NOUN	NN	Number=Sing	17	nmod	_	SpaceAfter=No
21	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* |  |  |  |  |  | vn characterize-29.2-1-1 «NP V S\_ING»: agent=Agent clause=Theme |
| 2 | **mean** | present | the |  |  |  |  |  | vn intend-61.2-1 «NP V S»: agent=Agent |
| 3 | **ascertain** | present | a live stop display |  |  |  | time |  | vn discover-84 «NP V how S»: agent=Agent |
| 4 | **expect** | participle |  |  |  |  |  |  | vn conjecture-29.5-1 «NP V that S»: agent=Agent |
| 5 | **arrive** |  | a vehicle |  |  |  |  |  | nom arrival «act intransitive»: of=agent |

<!-- .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 display detects the sound of the engine

```conllu
# sent_id = question:technology:20-buses-trams-lorries-and-traffic-lights:e1:o1:1
# text = The display detects the sound of the engine
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	display	display	NOUN	NN	Number=Sing	3	nsubj	_	_
3	detects	detect	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	sound	sound	NOUN	NN	Number=Sing	3	obj	_	_
6	of	of	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	engine	engine	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **detect** | present | the display | the sound of the engine |  |  |  |  | vn see-30.1-1 «NP V S»: agent=Experiencer sound=Stimulus |

### Option 2 {#o2}

<!-- .ven lang=en -->
The display counts waiting passengers

```conllu
# sent_id = question:technology:20-buses-trams-lorries-and-traffic-lights:e1:o2:1
# text = The display counts waiting passengers
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	display	display	NOUN	NN	Number=Sing	3	nsubj	_	_
3	counts	count	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	waiting	wait	VERB	VBG	VerbForm=Ger	3	xcomp	_	_
5	passengers	passenger	NOUN	NNS	Number=Plur	4	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **count** | present | the display |  |  |  |  |  | tree rules |
| 2 | **wait** | gerund | the display *not said here* | passengers |  |  |  |  | tree rules |

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

<!-- .ven lang=en -->
The vehicle transmits its satellite-derived position to a computer

```conllu
# sent_id = question:technology:20-buses-trams-lorries-and-traffic-lights:e1:o3:1
# text = The vehicle transmits its satellite-derived position to a computer
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	vehicle	vehicle	NOUN	NN	Number=Sing	3	nsubj	_	_
3	transmits	transmit	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	8	nmod:poss	_	_
5	satellite	satellite	NOUN	NN	Number=Sing	7	compound	_	SpaceAfter=No
6	-	-	PUNCT	HYPH	_	5	punct	_	SpaceAfter=No
7	derived	derive	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	8	amod	_	_
8	position	position	NOUN	NN	Number=Sing	3	obj	_	_
9	to	to	ADP	IN	_	11	case	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
11	computer	computer	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **transmit** | present | the vehicle | vehicle's derived position |  | a computer |  |  | vn send-11.1-1 «NP V NP PP.destination»: agent=Agent position=Theme to computer=Destination |
| 2 | **derive** | participle |  |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
The driver telephones each stop in turn

```conllu
# sent_id = question:technology:20-buses-trams-lorries-and-traffic-lights:e1:o4:1
# text = The driver telephones each stop in turn
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	driver	driver	NOUN	NN	Number=Sing	3	nsubj	_	_
3	telephones	telephone	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	each	each	DET	DT	PronType=Tot	5	det	_	_
5	stop	stop	NOUN	NN	Number=Sing	3	obj	_	_
6	in	in	ADP	IN	_	7	case	_	_
7	turn	turn	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **telephone** *speech: other* | present | the driver | each stop |  | turn |  |  | vn initiate\_communication-37.4.2-1 «NP V NP.recipient»: agent=Agent stop=Recipient |

<!-- 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 -->

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- ← previous: [Buses, trams, lorries and traffic lights, test 11](https://md.mova.elamur.ai/free/en/corpora/questions/technology/20-buses-trams-lorries-and-traffic-lights/t11/)
- next →: [Buses, trams, lorries and traffic lights, exam 2](https://md.mova.elamur.ai/free/en/corpora/questions/technology/20-buses-trams-lorries-and-traffic-lights/e2/)
- ↑ back to [Buses, trams, lorries and traffic lights](https://md.mova.elamur.ai/free/en/corpora/questions/technology/20-buses-trams-lorries-and-traffic-lights/)