---
title: Natural selection is usually slow, but sometimes we can watch it hap… — Natural selection we can watch: moths, finches,… · tree and pragmatics
description: Natural selection is usually slow, but sometimes we can watch it happen within a few years or decades, like a film on fast-forward. Who acts: Natural selection, we, selection. A sentence of the lesson «Natural selection we can watch: moths, finches, germs and tuskless elephants» of the biology cours
---

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# Natural selection we can watch: moths, finches, germs and tuskless elephants, sentence 0

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Natural selection is usually slow, but sometimes we can watch it happen within a few years or decades, like a film on fast-forward.

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**Who acts:** Natural selection, we, selection · **What happens:** be, watch, happen · **To what, where:** selection

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This is a sentence of the lesson «Natural selection we can watch: moths, finches, germs and tuskless elephants» 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 (Natural selection, we, selection), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:279-natural-selection-we-can-watch-moths-finches-germs-and-tuskless-elephants.lesson:0
# text = Natural selection is usually slow, but sometimes we can watch it happen within a few years or decades, like a film on fast-forward.
# source = school lesson (ours)
# course = biology
# lesson = 279-natural-selection-we-can-watch-moths-finches-germs-and-tuskless-elephants.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	Natural	natural	ADJ	JJ	Degree=Pos	2	amod	_	_
2	selection	selection	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	usually	usually	ADV	RB	_	5	advmod	_	_
5	slow	slow	ADJ	JJ	Degree=Pos	0	root	_	_
6	,	,	PUNCT	,	_	11	punct	_	_
7	but	but	CCONJ	CC	_	11	cc	_	_
8	sometimes	sometimes	ADV	RB	PronType=Ind	11	advmod	_	_
9	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	11	nsubj	_	_
10	can	can	AUX	MD	VerbForm=Fin	11	aux	_	_
11	watch	watch	VERB	VB	VerbForm=Inf	5	conj	_	Agree=R7-rel-agree|Haiku=5:parataxis
12	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	obj	_	_
13	happen	happen	VERB	VB	VerbForm=Inf	11	xcomp	_	_
14	within	within	ADP	IN	_	17	case	_	_
15	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
16	few	few	ADJ	JJ	Degree=Pos	17	amod	_	_
17	years	year	NOUN	NNS	Number=Plur	13	obl	_	_
18	or	or	CCONJ	CC	_	19	cc	_	_
19	decades	decade	NOUN	NNS	Number=Plur	17	conj	_	_
20	,	,	PUNCT	,	_	23	punct	_	_
21	like	like	ADP	IN	_	23	case	_	_
22	a	a	DET	DT	Definite=Ind|PronType=Art	23	det	_	_
23	film	film	NOUN	NN	Number=Sing	11	parataxis	_	_
24	on	on	ADP	IN	_	25	case	_	_
25	fast	fast	ADJ	JJ	Degree=Pos	23	amod	_	_
26	-	-	PUNCT	HYPH	_	25	punct	_	_
27	forward	forward	ADV	RB	_	25	advmod	_	_
28	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Natural selection |  |  |  |  | slow, usually *property* | tree rules |
| 2 | **watch** | can | we | selection |  |  |  | sometimes *property* | tree rules |
| 3 | **happen** | infinitive | selection *not said here* |  |  |  | year |  | vn occur-48.3-1 «NP V»: agent=Theme |

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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:279-natural-selection-we-can-watch-moths-finches-germs-and-tuskless-elephants.lesson:0`.

**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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