Mars, sentence 4

No life has been found yet; a 2025 rock sample has patterns that could be a sign of old microbes, but scientists say it is only a possible sign, not proof.

Who acts: rock sample, patterns, scientists, life · What happens: find, have, be, say · To what, where: life, patterns, sign, possible sign · Speech: someone speaks here

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 (rock sample, patterns, scientists, life), what happens, when and where, as Mova's frames read it from the tree.

The tree

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	No	no	DET	PronType=Neg	2 life	det
2	life	life	NOUN	Number=Sing	5 found	nsubj:pass
3	has	have	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	5 found	aux
4	been	be	AUX	Tense=Past VerbForm=Part	5 found	aux:pass
5	found	find	VERB	Tense=Past VerbForm=Part Voice=Pass	root	root
6	yet	yet	ADV	_	5 found	advmod
7	;	;	PUNCT	_	12 has	punct
8	a	a	DET	Definite=Ind PronType=Art	11 sample	det
9	2025	2025	NUM	NumForm=Digit NumType=Card	10 rock	nummod
10	rock	rock	NOUN	Number=Sing	11 sample	compound
11	sample	sample	NOUN	Number=Sing	12 has	nsubj
12	has	have	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	5 found	parataxis
13	patterns	pattern	NOUN	Number=Plur	12 has	obj
14	that	that	PRON	PronType=Rel	18 sign	nsubj
15	could	could	AUX	VerbForm=Fin	18 sign	aux
16	be	be	AUX	VerbForm=Inf	18 sign	cop
17	a	a	DET	Definite=Ind PronType=Art	18 sign	det
18	sign	sign	NOUN	Number=Sing	13 patterns	acl:relcl
19	of	of	ADP	_	21 microbes	case
20	old	old	ADJ	Degree=Pos	21 microbes	amod
21	microbes	microbe	NOUN	Number=Plur	18 sign	nmod
22	,	,	PUNCT	_	25 say	punct
23	but	but	CCONJ	_	25 say	cc
24	scientists	scientist	NOUN	Number=Plur	25 say	nsubj
25	say	say	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	5 found	conj
26	it	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	31 sign	nsubj
27	is	be	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	31 sign	cop
28	only	only	ADV	_	31 sign	advmod
29	a	a	DET	Definite=Ind PronType=Art	31 sign	det
30	possible	possible	ADJ	Degree=Pos	31 sign	amod
31	sign	sign	NOUN	Number=Sing	25 say	ccomp
32	,	,	PUNCT	_	34 proof	punct
33	not	not	PART	Polarity=Neg	34 proof	advmod
34	proof	proof	NOUN	Number=Sing	31 sign	conj
35	.	.	PUNCT	_	5 found	punct

Pragmatics

No stored speech act for this sentence.

#	verb	tense, mood	who	what, whom	when	other	roles by
1	find	present · perfect · passive		no life	yet		vn discover-84 «NP V NP»: subject=Topic
2	have	present	a rock sample	patterns			vn birth-28.2-1 «NP V NP»: agent=Agent pattern=Patient
3	is a	could	patterns	a sign		of old microbes	tree rules
4	say speech: assert	present	scientists				vn say-37.7-1-1 «NP V that S»: agent=Agent
5	is a	present	life	a possible sign and proof			tree rules

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.

Licence: CC 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:4.

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): R7-rel-agree ×2. 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.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/space/8-mars/4/