---
title: The biggest mass extinction, about 252 million years ago, wiped out… — Deep time and the story of life · tree and pragmatics
description: The biggest mass extinction, about 252 million years ago, wiped out about 90% of sea species. Who acts: biggest mass extinction. A sentence of the lesson «Deep time and the story of life» of the geography course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Deep time and the story of life, sentence 16

<!-- .ven lang=en -->
The biggest mass extinction, about 252 million years ago, wiped out about 90% of sea species.

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**Who acts:** biggest mass extinction · **What happens:** wipe out

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This is a sentence of the lesson «Deep time and the story of life» of the geography 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 (biggest mass extinction), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:geography:058-deep-time-and-the-story-of-life.lesson:16
# text = The biggest mass extinction, about 252 million years ago, wiped out about 90% of sea species.
# source = school lesson (ours)
# course = geography
# lesson = 058-deep-time-and-the-story-of-life.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): R7-rel-agree ×1
1	The	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
2	biggest	big	ADJ	JJS	Degree=Sup	4	amod	_	_
3	mass	mass	ADJ	JJ	Degree=Pos	4	amod	_	_
4	extinction	extinction	NOUN	NN	Number=Sing	12	nsubj	_	_
5	,	,	PUNCT	,	_	12	punct	_	_
6	about	about	ADV	RB	_	8	advmod	_	_
7	252	252	NUM	CD	NumForm=Digit|NumType=Card	8	compound	_	_
8	million	million	NUM	CD	NumForm=Word|NumType=Card	9	nummod	_	_
9	years	year	NOUN	NNS	Number=Plur	10	obl:unmarked	_	_
10	ago	ago	ADV	RB	_	12	advmod	_	_
11	,	,	PUNCT	,	_	12	punct	_	_
12	wiped	wipe	VERB	VBD	Mood=Ind|Tense=Past|VerbForm=Fin	0	root	_	_
13	out	out	ADP	RP	_	12	compound:prt	_	_
14	about	about	ADV	RB	_	15	advmod	_	_
15	90	90	NUM	CD	NumForm=Digit|NumType=Card	16	nummod	_	_
16	%	%	SYM	NN	Number=Sing	12	obj	_	_
17	of	of	ADP	IN	_	19	case	_	_
18	sea	sea	NOUN	NN	Number=Sing	19	compound	_	Agree=R7-rel-agree|Haiku=19:amod|HaikuPos=ADJ:JJ:Degree=Pos
19	species	species	NOUN	NNS	Number=Plur	16	nmod	_	_
20	.	.	PUNCT	.	_	12	punct	_	_
```

## Pragmatics {#pragmatics}

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- 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 | **wipe out** | past | the biggest mass extinction |  |  |  |  | ago *property* | vn wipe\_manner-10.4.1-1 «NP V NP.source»: agent=Agent %=Source |

<!-- .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:geography:058-deep-time-and-the-story-of-life.lesson:16`.

**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 ×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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