---
title: All over the world a thin clay layer rich in iridium marks the end o… — The asteroid: the day the dinosaurs died and who… · tree and pragmatics
description: All over the world a thin clay layer rich in iridium marks the end of the dinosaurs; iridium is rare on Earth but common in asteroids, a clue found by Luis and Walter Alvarez, father and son, in 1980. Who acts: thin clay layer, iridium. A sentence of the lesson «The asteroid: the day the dinosaurs d
---

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# The asteroid: the day the dinosaurs died and who survived, sentence 7

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All over the world a thin clay layer rich in iridium marks the end of the dinosaurs; iridium is rare on Earth but common in asteroids, a clue found by Luis and Walter Alvarez, father and son, in 1980.

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**Who acts:** thin clay layer, iridium · **What happens:** mark, be, find · **To what, where:** end, world, Earth, asteroids, clue, 1980

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This is a sentence of the lesson «The asteroid: the day the dinosaurs died and who survived» of the biology 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 (thin clay layer, iridium), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:271-the-asteroid-the-day-the-dinosaurs-died.lesson:7
# text = All over the world a thin clay layer rich in iridium marks the end of the dinosaurs; iridium is rare on Earth but common in asteroids, a clue found by Luis and Walter Alvarez, father and son, in 1980.
# source = school lesson (ours)
# course = biology
# lesson = 271-the-asteroid-the-day-the-dinosaurs-died.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 ×2
1	All	all	ADV	RB	_	12	advmod	_	_
2	over	over	ADP	IN	_	4	case	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	world	world	NOUN	NN	Number=Sing	12	obl	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
6	thin	thin	ADJ	JJ	Degree=Pos	8	amod	_	_
7	clay	clay	NOUN	NN	Number=Sing	8	compound	_	_
8	layer	layer	NOUN	NN	Number=Sing	12	nsubj	_	_
9	rich	rich	ADJ	JJ	Degree=Pos	8	amod	_	_
10	in	in	ADP	IN	_	11	case	_	_
11	iridium	iridium	NOUN	NN	Number=Sing	9	obl	_	Agree=R7-rel-agree|Haiku=9:nmod
12	marks	mark	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	end	end	NOUN	NN	Number=Sing	12	obj	_	_
15	of	of	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	dinosaurs	dinosaur	NOUN	NNS	Number=Plur	14	nmod	_	_
18	;	;	PUNCT	,	_	21	punct	_	_
19	iridium	iridium	NOUN	NN	Number=Sing	21	nsubj	_	_
20	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	21	cop	_	_
21	rare	rare	ADJ	JJ	Degree=Pos	12	parataxis	_	Agree=R7-rel-agree|Haiku=12:conj
22	on	on	ADP	IN	_	23	case	_	_
23	Earth	Earth	PROPN	NNP	Number=Sing	21	obl	_	_
24	but	but	CCONJ	CC	_	25	cc	_	_
25	common	common	ADJ	JJ	Degree=Pos	21	conj	_	_
26	in	in	ADP	IN	_	27	case	_	_
27	asteroids	asteroid	NOUN	NNS	Number=Plur	25	obl	_	_
28	,	,	PUNCT	,	_	30	punct	_	_
29	a	a	DET	DT	Definite=Ind|PronType=Art	30	det	_	_
30	clue	clue	NOUN	NN	Number=Sing	27	conj	_	_
31	found	find	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	30	acl	_	_
32	by	by	ADP	IN	_	33	case	_	_
33	Luis	Luis	PROPN	NNP	Number=Sing	31	obl:agent	_	_
34	and	and	CCONJ	CC	_	35	cc	_	_
35	Walter	Walter	PROPN	NNP	Number=Sing	33	conj	_	_
36	Alvarez	Alvarez	PROPN	NNP	Number=Sing	35	flat	_	_
37	,	,	PUNCT	,	_	38	punct	_	_
38	father	father	NOUN	NN	Number=Sing	33	appos	_	_
39	and	and	CCONJ	CC	_	40	cc	_	_
40	son	son	NOUN	NN	Number=Sing	38	conj	_	_
41	,	,	PUNCT	,	_	43	punct	_	_
42	in	in	ADP	IN	_	43	case	_	_
43	1980	1980	NUM	CD	NumForm=Digit|NumType=Card	31	obl	_	_
44	.	.	PUNCT	.	_	12	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- 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 | **mark** | present | a thin clay layer | the end of the dinosaurs |  | the world |  | all *property* | vn image\_impression-25.1 «NP V NP.theme PP.destination»: agent=Agent end=Theme over world=Destination |
| 2 | **is** | present | iridium |  |  | Earth |  | rare *property* | tree rules |
| 3 | **be** |  | iridium *not said here* |  |  | asteroids and a clue |  |  | tree rules |
| 4 | **find** | participle |  | a clue *not said here* |  | 1980 |  |  | vn declare-29.4-1-1 «NP V what S\_INF»: agent=Agent |

<!-- .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:biology:271-the-asteroid-the-day-the-dinosaurs-died.lesson:7`.

**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](https://md.mova.elamur.ai/free/en/releases/0.4/).

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