---
title: Trilobites were sea creatures with jointed legs and hard shells, dis… — How old is it? Rock layers, rock clocks, amber a… · tree and pragmatics
description: Trilobites were sea creatures with jointed legs and hard shells, distant cousins of crabs and insects; they lived for about 270 million years and had some of the first complex eyes, made of crystal. Who acts: Trilobites. A sentence of the lesson «How old is it? Rock layers, rock clocks, amber and th
---

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# How old is it? Rock layers, rock clocks, amber and the long story of life, sentence 13

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Trilobites were sea creatures with jointed legs and hard shells, distant cousins of crabs and insects; they lived for about 270 million years and had some of the first complex eyes, made of crystal.

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**Who acts:** Trilobites · **What happens:** be, joint, live, have, make · **To what, where:** sea creatures, some, first complex eyes

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This is a sentence of the lesson «How old is it? Rock layers, rock clocks, amber and the long story of life» 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 (Trilobites), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:276-how-old-is-it-rock-layers-rock-clocks-amber-and-the-long-story-of-life.lesson:13
# text = Trilobites were sea creatures with jointed legs and hard shells, distant cousins of crabs and insects; they lived for about 270 million years and had some of the first complex eyes, made of crystal.
# source = school lesson (ours)
# course = biology
# lesson = 276-how-old-is-it-rock-layers-rock-clocks-amber-and-the-long-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): R5-strong ×1, R7-rel-agree ×1
1	Trilobites	trilobite	NOUN	NNS	Number=Plur	4	nsubj	_	_
2	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	4	cop	_	_
3	sea	sea	NOUN	NN	Number=Sing	4	compound	_	Agree=R7-rel-agree|Haiku=4:amod|HaikuPos=ADJ:JJ:Degree=Pos
4	creatures	creature	NOUN	NNS	Number=Plur	0	root	_	_
5	with	with	ADP	IN	_	7	case	_	_
6	jointed	joint	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	amod	_	_
7	legs	leg	NOUN	NNS	Number=Plur	4	nmod	_	_
8	and	and	CCONJ	CC	_	10	cc	_	_
9	hard	hard	ADJ	JJ	Degree=Pos	10	amod	_	_
10	shells	shell	NOUN	NNS	Number=Plur	7	conj	_	Agree=R5-strong|Haiku=4:conj
11	,	,	PUNCT	,	_	13	punct	_	_
12	distant	distant	ADJ	JJ	Degree=Pos	13	amod	_	_
13	cousins	cousin	NOUN	NNS	Number=Plur	4	conj	_	_
14	of	of	ADP	IN	_	15	case	_	_
15	crabs	crab	NOUN	NNS	Number=Plur	13	nmod	_	_
16	and	and	CCONJ	CC	_	17	cc	_	_
17	insects	insect	NOUN	NNS	Number=Plur	15	conj	_	_
18	;	;	PUNCT	:	_	20	punct	_	_
19	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	20	nsubj	_	_
20	lived	live	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	13	parataxis	_	_
21	for	for	ADP	IN	_	25	case	_	_
22	about	about	ADV	RB	_	23	advmod	_	_
23	270	270	NUM	CD	NumForm=Digit|NumType=Card	24	compound	_	_
24	million	million	NUM	CD	NumForm=Word|NumType=Card	25	nummod	_	_
25	years	year	NOUN	NNS	Number=Plur	20	obl	_	_
26	and	and	CCONJ	CC	_	27	cc	_	_
27	had	have	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	20	conj	_	_
28	some	some	DET	DT	PronType=Ind	27	obj	_	_
29	of	of	ADP	IN	_	33	case	_	_
30	the	the	DET	DT	Definite=Def|PronType=Art	33	det	_	_
31	first	first	ADJ	JJ	Degree=Pos|NumForm=Word|NumType=Ord	33	amod	_	_
32	complex	complex	ADJ	JJ	Degree=Pos	33	amod	_	_
33	eyes	eye	NOUN	NNS	Number=Plur	28	nmod	_	_
34	,	,	PUNCT	,	_	35	punct	_	_
35	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	33	acl	_	_
36	of	of	ADP	IN	_	37	case	_	_
37	crystal	crystal	NOUN	NN	Number=Sing	35	obl	_	_
38	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

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- 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 | **is a** | past | Trilobites | sea creatures and distant cousins of crabs and insects |  |  |  | with jointed legs and hard shells | tree rules |
| 2 | **joint** | participle |  |  |  |  |  |  | tree rules |
| 3 | **live** | past | Trilobites *= trilobite* |  |  |  | year |  | vn exist-47.1-1 «NP V»: agent=Theme |
| 4 | **have** | past | Trilobites *= trilobite* *not said here* | some |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent some=Patient |
| 5 | **make** | participle |  | the first complex eyes *not said here* |  |  |  | of crystal | vn build-26.1-1 «NP.asset V NP»: agent=Asset |

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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:276-how-old-is-it-rock-layers-rock-clocks-amber-and-the-long-story-of-life.lesson:13`.

**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, 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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- ← previous: [How old is it? Rock layers, rock clock…, 12](https://md.mova.elamur.ai/free/en/corpora/school/biology/276-how-old-is-it-rock-layers-rock-clocks-amber-and-the-long-story-of-life/12/)
- next →: [How old is it? Rock layers, rock clock…, 14](https://md.mova.elamur.ai/free/en/corpora/school/biology/276-how-old-is-it-rock-layers-rock-clocks-amber-and-the-long-story-of-life/14/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/biology/276-how-old-is-it-rock-layers-rock-clocks-amber-and-the-long-story-of-life/)

