---
title: Identify the principal reason for which a rover upon Mars cannot be… — Robots at work and at home · tree and pragmatics
description: Identify the principal reason for which a rover upon Mars cannot be steered in real time from the Earth. Exam question 2 of lesson 39 «Robots at work and at home» of the technology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's cho
---

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# Exam question 2 · Robots at work and at home

<!-- .ven lang=en -->
Identify the principal reason for which a rover upon Mars cannot be steered in real time from the Earth.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you · **What happens:** identify, not steer · **To what, where:** principal reason, rover

<!-- .vabout -->
This is exam question 2 of lesson 39 «Robots at work and at home» 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/39-robots-at-work-and-at-home/#e2).

## The question {#question}

```conllu
# sent_id = question:technology:39-robots-at-work-and-at-home:e2:1
# text = Identify the principal reason for which a rover upon Mars cannot be steered in real time from the Earth.
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	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	14	obl	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	rover	rover	NOUN	NN	Number=Sing	14	nsubj:pass	_	_
9	upon	upon	ADP	IN	_	10	case	_	_
10	Mars	Mars	PROPN	NNP	Number=Sing	8	nmod	_	_
11	can	can	AUX	MD	VerbForm=Fin	14	aux	_	SpaceAfter=No
12	not	not	PART	RB	Polarity=Neg	14	advmod	_	_
13	be	be	AUX	VB	VerbForm=Inf	14	aux:pass	_	_
14	steered	steer	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	acl:relcl	_	_
15	in	in	ADP	IN	_	17	case	_	_
16	real	real	ADJ	JJ	Degree=Pos	17	amod	_	_
17	time	time	NOUN	NN	Number=Sing	14	obl	_	_
18	from	from	ADP	IN	_	20	case	_	_
19	the	the	DET	DT	Definite=Def|PronType=Art	20	det	_	_
20	Earth	Earth	PROPN	NNP	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* | the principal reason |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **not** **steer** | can · passive |  | a rover upon Mars |  |  | time | for the principal reason | vn accompany-51.7 «NP V NP»: subject=Theme |

<!-- .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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Radio signals require several minutes to travel between the two planets

```conllu
# sent_id = question:technology:39-robots-at-work-and-at-home:e2:o1:1
# text = Radio signals require several minutes to travel between the two planets
1	Radio	Radio	PROPN	NNP	Number=Sing	2	compound	_	_
2	signals	signal	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	require	require	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	several	several	ADJ	JJ	Degree=Pos	5	amod	_	_
5	minutes	minute	NOUN	NNS	Number=Plur	3	obj	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	travel	travel	VERB	VB	VerbForm=Inf	3	advcl	_	_
8	between	between	ADP	IN	_	11	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	two	two	NUM	CD	NumForm=Word|NumType=Card	11	nummod	_	_
11	planets	planet	NOUN	NNS	Number=Plur	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **require** | present | Radio signals |  |  |  | minute |  | vn require-103-1 «NP V NP S\_INF»: agent=Theme |
| 2 | **travel** | to-infinitive | Radio signals *not said here* |  |  | the two planets |  |  | vn run-51.3.2-1 «NP V PP.location»: agent=Theme between planet=Trajectory |

### Option 2 {#o2}

<!-- .ven lang=en -->
The rover is not equipped with wheels

```conllu
# sent_id = question:technology:39-robots-at-work-and-at-home:e2:o2:1
# text = The rover is not equipped with wheels
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	rover	rover	NOUN	NN	Number=Sing	5	nsubj:pass	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux:pass	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	equipped	equip	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
6	with	with	ADP	IN	_	7	case	_	_
7	wheels	wheel	NOUN	NNS	Number=Plur	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **equip** | present · passive |  | the rover |  |  |  | with wheels | vn equip-13.4.2-1 «NP V NP-Fulfilling PP»: subject=Recipient with wheel=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
The use of controllers is prohibited upon Mars by international agreement between nations

```conllu
# sent_id = question:technology:39-robots-at-work-and-at-home:e2:o3:1
# text = The use of controllers is prohibited upon Mars by international agreement between nations
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	use	use	NOUN	NN	Number=Sing	6	nsubj:pass	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	controllers	controller	NOUN	NNS	Number=Plur	2	nmod	_	_
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	aux:pass	_	_
6	prohibited	prohibit	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
7	upon	upon	ADP	IN	_	8	case	_	_
8	Mars	Mars	PROPN	NNP	Number=Sing	6	obl	_	_
9	by	by	ADP	IN	_	11	case	_	_
10	international	international	ADJ	JJ	Degree=Pos	11	amod	_	_
11	agreement	agreement	NOUN	NN	Number=Sing	6	obl	_	_
12	between	between	ADP	IN	_	13	case	_	_
13	nations	nation	NOUN	NNS	Number=Plur	11	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **prohibit** | present · passive | international agreement between nations | the use of controllers |  |  |  | upon Mars | vn forbid-64.4-1 «NP V NP»: agent=Causer subject=Theme |
| 2 | **use** |  |  | controllers |  |  |  |  | nom use «act transitive»: of=patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The surface of Mars is insufficiently illuminated

```conllu
# sent_id = question:technology:39-robots-at-work-and-at-home:e2:o4:1
# text = The surface of Mars is insufficiently illuminated
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	surface	surface	NOUN	NN	Number=Sing	7	nsubj:pass	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	Mars	Mars	PROPN	NNP	Number=Sing	2	nmod	_	_
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux:pass	_	_
6	insufficiently	insufficiently	ADV	RB	_	7	advmod	_	_
7	illuminated	illuminate	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **illuminate** | present · passive |  | the surface of Mars |  |  |  | insufficiently *property* | vn illustrate-25.3 «NP V NP»: subject=Destination |

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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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