---
title: From the echo the bat's brain works out how far away a moth is, whic… — Echolocation: how bats see with sound · tree and pragmatics
description: From the echo the bat's brain works out how far away a moth is, which way it is flying and even how big it is, so it «sees» with its ears. Who acts: brain, moth. A sentence of the lesson «Echolocation: how bats see with sound» of the biology course of Mova's primary school with its dependency tree a
---

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# Echolocation: how bats see with sound, sentence 2

<!-- .ven lang=en -->
From the echo the bat's brain works out how far away a moth is, which way it is flying and even how big it is, so it «sees» with its ears.

<!-- .vintro -->
**Who acts:** brain, moth · **What happens:** work out, be, fly, see · **To what, where:** echo, way

<!-- .vabout -->
This is a sentence of the lesson «Echolocation: how bats see with sound» 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 (brain, moth), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:229-echolocation-how-bats-see-with-sound.lesson:2
# text = From the echo the bat's brain works out how far away a moth is, which way it is flying and even how big it is, so it «sees» with its ears.
# source = school lesson (ours)
# course = biology
# lesson = 229-echolocation-how-bats-see-with-sound.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, R6-punct-agree ×1
1	From	from	ADP	IN	_	3	case	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	echo	echo	NOUN	NN	Number=Sing	8	obl	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	bat	bat	NOUN	NN	Number=Sing	7	nmod:poss	_	_
6	's	's	PART	POS	_	5	case	_	_
7	brain	brain	NOUN	NN	Number=Sing	8	nsubj	_	_
8	works	work	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	out	out	ADP	RP	_	8	compound:prt	_	_
10	how	how	ADV	WRB	PronType=Int	11	advmod	_	Agree=R5-strong|Haiku=12:advmod
11	far	far	ADV	RB	Degree=Pos	12	advmod	_	_
12	away	away	ADV	RB	_	15	advmod	_	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
14	moth	moth	NOUN	NN	Number=Sing	15	nsubj	_	_
15	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	ccomp	_	_
16	,	,	PUNCT	,	_	21	punct	_	_
17	which	which	DET	WDT	PronType=Int	18	det	_	_
18	way	way	NOUN	NN	Number=Sing	21	obl:unmarked	_	_
19	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	21	nsubj	_	_
20	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	21	aux	_	_
21	flying	fly	VERB	VBG	Tense=Pres|VerbForm=Part	8	conj	_	_
22	and	and	CCONJ	CC	_	25	cc	_	_
23	even	even	ADV	RB	_	25	advmod	_	_
24	how	how	ADV	WRB	PronType=Int	25	advmod	_	_
25	big	big	ADJ	JJ	Degree=Pos	21	conj	_	_
26	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	25	nsubj	_	_
27	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	25	cop	_	_
28	,	,	PUNCT	,	_	32	punct	_	_
29	so	so	ADV	RB	_	32	advmod	_	_
30	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	32	nsubj	_	_
31	«	«	PUNCT	``	_	32	punct	_	_
32	sees	see	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	21	advcl	_	_
33	»	»	PUNCT	''	_	32	punct	_	Agree=R6-punct-agree|Haiku=36:punct
34	with	with	ADP	IN	_	36	case	_	_
35	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	36	nmod:poss	_	_
36	ears	ear	NOUN	NNS	Number=Plur	32	obl	_	_
37	.	.	PUNCT	.	_	8	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **work out** | present | the bat's brain |  |  | the echo |  |  | vn discover-84 «NP V how S»: agent=Agent clause=Topic |
| 2 | **be** | present | a moth |  |  |  |  | away *property* | vn exist-47.1 «NP V»: agent=Theme |
| 3 | **fly** | present · progressive | moth | which way |  |  |  |  | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |
| 4 | **is** | present | moth |  |  |  |  | big *property* | tree rules |
| 5 | **see** *in a quote* | present | moth |  |  |  |  | with bat's ears | vn comprehend-87.2-1-1 «NP V»: agent=Experiencer |

<!-- .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:229-echolocation-how-bats-see-with-sound.lesson:2`.

**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, R6-punct-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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