---
title: NASA's Curiosity rover has been exploring Gale Crater since 2012, an… — Mars · tree and pragmatics
description: NASA's Curiosity rover has been exploring Gale Crater since 2012, and Perseverance has explored Jezero Crater, an old lake bed, since 2021. Who acts: Curiosity rover, Perseverance. A sentence of the lesson «Mars» of the space course of Mova's primary school with its dependency tree and the pragmatic
---

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# Mars, sentence 11

<!-- .ven lang=en -->
NASA's Curiosity rover has been exploring Gale Crater since 2012, and Perseverance has explored Jezero Crater, an old lake bed, since 2021.

<!-- .vintro -->
**Who acts:** Curiosity rover, Perseverance · **What happens:** explore · **To what, where:** Gale Crater, Jezero

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This is a sentence of the lesson «Mars» of the space 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 (Curiosity rover, Perseverance), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:space:008-mars.lesson:11
# text = NASA's Curiosity rover has been exploring Gale Crater since 2012, and Perseverance has explored Jezero Crater, an old lake bed, since 2021.
# source = school lesson (ours)
# course = space
# lesson = 008-mars.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, R8-pos-agree ×4
1	NASA	NASA	PROPN	NNP	Number=Sing	4	nmod:poss	_	_
2	's	's	PART	POS	_	1	case	_	_
3	Curiosity	curiosity	PROPN	NNP	Number=Sing	4	compound	_	Agree=R8-pos-agree|Haiku=4:compound|HaikuPos=NOUN:NN:Number=Sing
4	rover	rover	NOUN	NN	Number=Sing	7	nsubj	_	_
5	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux	_	_
6	been	be	AUX	VBN	Tense=Past|VerbForm=Part	7	aux	_	_
7	exploring	explore	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
8	Gale	gale	PROPN	NNP	Number=Sing	9	compound	_	Agree=R8-pos-agree|Haiku=9:compound|HaikuPos=NOUN:NN:Number=Sing
9	Crater	crater	PROPN	NNP	Number=Sing	7	obj	_	Agree=R8-pos-agree|Haiku=7:obj|HaikuPos=NOUN:NN:Number=Sing
10	since	since	ADP	IN	_	11	case	_	_
11	2012	2012	NUM	CD	NumForm=Digit|NumType=Card	7	obl	_	_
12	,	,	PUNCT	,	_	16	punct	_	_
13	and	and	CCONJ	CC	_	16	cc	_	_
14	Perseverance	Perseverance	PROPN	NNP	Number=Sing	16	nsubj	_	Agree=R8-pos-agree|Haiku=16:nsubj|HaikuPos=NOUN:NN:Number=Sing
15	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	16	aux	_	_
16	explored	explore	VERB	VBN	Tense=Past|VerbForm=Part	7	conj	_	_
17	Jezero	Jezero	PROPN	NNP	Number=Sing	16	obj	_	_
18	Crater	crater	PROPN	NNP	Number=Sing	17	flat	_	_
19	,	,	PUNCT	,	_	23	punct	_	_
20	an	a	DET	DT	Definite=Ind|PronType=Art	23	det	_	_
21	old	old	ADJ	JJ	Degree=Pos	23	amod	_	_
22	lake	lake	NOUN	NN	Number=Sing	23	compound	_	_
23	bed	bed	NOUN	NN	Number=Sing	18	appos	_	Agree=R5-strong|Haiku=17:appos
24	,	,	PUNCT	,	_	26	punct	_	_
25	since	since	ADP	IN	_	26	case	_	_
26	2021	2021	NUM	CD	NumForm=Digit|NumType=Card	16	obl	_	_
27	.	.	PUNCT	.	_	7	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **explore** | present · perfect · progressive | NASA's Curiosity rover | Gale Crater |  |  | since 2012 |  | vn investigate-35.4 «NP V NP.location»: agent=Agent crater=Location |
| 2 | **explore** | present · perfect | Perseverance | Jezero |  |  | since 2021 |  | vn investigate-35.4 «NP V NP.location»: agent=Agent jezero=Location |

<!-- .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.

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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:space:008-mars.lesson:11`.

**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, R8-pos-agree ×4. **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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