---
title: A Mars rover drives itself short distances because radio signals tak… — Olympiad: transport, building and energy ★★★ · tree and pragmatics
description: A Mars rover drives itself short distances because radio signals take minutes to travel between Mars and Earth. Who acts: Mars rover, radio signals. A sentence of the lesson «Olympiad: transport, building and energy ★★★» of the technology course of Mova's primary school with its dependency tree and 
---

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# Olympiad: transport, building and energy ★★★, sentence 17

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A Mars rover drives itself short distances because radio signals take minutes to travel between Mars and Earth.

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**Who acts:** Mars rover, radio signals · **What happens:** drive, take, travel · **To what, where:** rover, Mars

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This is a sentence of the lesson «Olympiad: transport, building and energy ★★★» of the technology course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (Mars rover, radio signals), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:technology:043-olympiad-transport-building-and-energy.lesson:17
# text = A Mars rover drives itself short distances because radio signals take minutes to travel between Mars and Earth.
# source = school lesson (ours)
# course = technology
# lesson = 043-olympiad-transport-building-and-energy.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1, R7-rel-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	Mars	Mars	PROPN	NNP	Number=Sing	3	compound	_	_
3	rover	rover	NOUN	NN	Number=Sing	4	nsubj	_	_
4	drives	drive	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	itself	itself	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs|Reflex=Yes	4	obj	_	_
6	short	short	ADJ	JJ	Degree=Pos	7	amod	_	_
7	distances	distance	NOUN	NNS	Number=Plur	4	obl	_	Agree=R7-rel-agree|Haiku=4:obj
8	because	because	SCONJ	IN	_	11	mark	_	_
9	radio	radio	NOUN	NN	Number=Sing	10	compound	_	_
10	signals	signal	NOUN	NNS	Number=Plur	11	nsubj	_	_
11	take	take	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	advcl	_	_
12	minutes	minute	NOUN	NNS	Number=Plur	11	obj	_	_
13	to	to	PART	TO	_	14	mark	_	_
14	travel	travel	VERB	VB	VerbForm=Inf	11	advcl	_	Agree=R5-strong|Haiku=12:acl
15	between	between	ADP	IN	_	16	case	_	_
16	Mars	Mars	PROPN	NNP	Number=Sing	14	obl	_	_
17	and	and	CCONJ	CC	_	18	cc	_	_
18	Earth	Earth	PROPN	NNP	Number=Sing	16	conj	_	_
19	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **drive** | present | a Mars rover | rover |  |  |  | short distances *obl* | vn nonvehicle-51.4.2-1 «NP V PP»: agent=Theme itself=Trajectory |
| 2 | **take** | present | radio signals |  |  |  | minute |  | vn bring-11.3 «NP V NP»: agent=Agent |
| 3 | **travel** | to-infinitive | radio signals *not said here* |  |  | Mars and Earth |  |  | vn run-51.3.2-1 «NP V PP.location»: agent=Theme between mars=Trajectory |

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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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:technology:043-olympiad-transport-building-and-energy.lesson:17`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1, R7-rel-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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