--- title: No life has been found on Mars, but in 2025 scientists reported that… — Mars · tree and pragmatics description: No life has been found on Mars, but in 2025 scientists reported that a Perseverance rock sample has chemical patterns that could be a possible sign of ancient microbes; this is not proof. Who acts: scientists, Perseverance rock sample, chemical patterns, this. A sentence of the lesson «Mars» of the --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/space/8-mars/12/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Space](https://md.mova.elamur.ai/free/en/corpora/school/space/) / [Mars](https://md.mova.elamur.ai/free/en/corpora/school/space/8-mars/) / 12 # Mars, sentence 12 No life has been found on Mars, but in 2025 scientists reported that a Perseverance rock sample has chemical patterns that could be a possible sign of ancient microbes; this is not proof. **Who acts:** scientists, Perseverance rock sample, chemical patterns, this · **What happens:** find, report, have, be, not be · **To what, where:** life, Mars, 2025, chemical patterns, possible sign, proof 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 (scientists, Perseverance rock sample, chemical patterns, this), 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:12 # text = No life has been found on Mars, but in 2025 scientists reported that a Perseverance rock sample has chemical patterns that could be a possible sign of ancient microbes; this is not proof. # 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 1 No no DET DT PronType=Neg 2 det _ _ 2 life life NOUN NN Number=Sing 5 nsubj:pass _ _ 3 has have AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 5 aux _ _ 4 been be AUX VBN Tense=Past|VerbForm=Part 5 aux:pass _ _ 5 found find VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 0 root _ _ 6 on on ADP IN _ 7 case _ _ 7 Mars Mars PROPN NNP Number=Sing 5 obl _ _ 8 , , PUNCT , _ 13 punct _ _ 9 but but CCONJ CC _ 13 cc _ _ 10 in in ADP IN _ 11 case _ _ 11 2025 2025 NUM CD NumForm=Digit|NumType=Card 13 obl _ _ 12 scientists scientist NOUN NNS Number=Plur 13 nsubj _ _ 13 reported report VERB VBD Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin 5 conj _ _ 14 that that SCONJ IN _ 19 mark _ _ 15 a a DET DT Definite=Ind|PronType=Art 18 det _ _ 16 Perseverance perseverance NOUN NN Number=Sing 18 compound _ Agree=R5-strong|Haiku=17:compound 17 rock rock NOUN NN Number=Sing 18 compound _ _ 18 sample sample NOUN NN Number=Sing 19 nsubj _ _ 19 has have VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 13 ccomp _ _ 20 chemical chemical ADJ JJ Degree=Pos 21 amod _ _ 21 patterns pattern NOUN NNS Number=Plur 19 obj _ _ 22 that that PRON WDT PronType=Rel 27 nsubj _ _ 23 could could AUX MD VerbForm=Fin 27 aux _ _ 24 be be AUX VB VerbForm=Inf 27 cop _ _ 25 a a DET DT Definite=Ind|PronType=Art 27 det _ _ 26 possible possible ADJ JJ Degree=Pos 27 amod _ _ 27 sign sign NOUN NN Number=Sing 21 acl:relcl _ _ 28 of of ADP IN _ 30 case _ _ 29 ancient ancient ADJ JJ Degree=Pos 30 amod _ _ 30 microbes microbe NOUN NNS Number=Plur 27 nmod _ _ 31 ; ; PUNCT , _ 35 punct _ _ 32 this this PRON DT Number=Sing|PronType=Dem 35 nsubj _ _ 33 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 35 cop _ _ 34 not not PART RB Polarity=Neg 35 advmod _ _ 35 proof proof NOUN NN Number=Sing 5 parataxis _ _ 36 . . PUNCT . _ 5 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **find** | present · perfect · passive | | no life | | Mars | | | vn discover-84 «NP V NP»: subject=Topic | | 2 | **report** | past | scientists | | | 2025 | | | vn characterize-29.2-1-2 «NP V NP»: agent=Agent clause=Theme | | 3 | **have** | present | a Perseverance rock sample | chemical patterns | | | | | vn birth-28.2-1 «NP V NP»: agent=Agent pattern=Patient | | 4 | **is a** | could | chemical patterns | a possible sign | | | | of ancient microbes | tree rules | | 5 | **not** **is a** | present | this | 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](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:12`. **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. **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/). - ← previous: [Mars, 11](https://md.mova.elamur.ai/free/en/corpora/school/space/8-mars/11/) - next →: [Mars, 13](https://md.mova.elamur.ai/free/en/corpora/school/space/8-mars/13/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/space/8-mars/)