---
title: Bats take off by letting go and dropping into flight, because their… — Myth check: are bats blind? · tree and pragmatics
description: Bats take off by letting go and dropping into flight, because their legs are too small and light to jump up from the ground like a bird. Who acts: Bats, legs. A sentence of the lesson «Myth check: are bats blind?» of the biology course of Mova's primary school with its dependency tree and the pragma
---

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# Myth check: are bats blind?, sentence 10

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Bats take off by letting go and dropping into flight, because their legs are too small and light to jump up from the ground like a bird.

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**Who acts:** Bats, legs · **What happens:** take off, let, go, drop, be, jump up · **To what, where:** flight, ground

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This is a sentence of the lesson «Myth check: are bats blind?» 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 (Bats, legs), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:153-are-bats-blind.lesson:10
# text = Bats take off by letting go and dropping into flight, because their legs are too small and light to jump up from the ground like a bird.
# source = school lesson (ours)
# course = biology
# lesson = 153-are-bats-blind.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, R8-pos-agree ×1
1	Bats	bat	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	take	take	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	Agree=R8-pos-agree|Haiku=0:root|HaikuPos=VERB:VB:Mood=Imp|VerbForm=Fin
3	off	off	ADP	RP	_	2	compound:prt	_	_
4	by	by	SCONJ	IN	_	5	mark	_	_
5	letting	let	VERB	VBG	Tense=Pres|VerbForm=Part	2	advcl	_	_
6	go	go	VERB	VB	VerbForm=Inf	5	xcomp	_	_
7	and	and	CCONJ	CC	_	8	cc	_	_
8	dropping	drop	VERB	VBG	Tense=Pres|VerbForm=Part	5	conj	_	_
9	into	into	ADP	IN	_	10	case	_	_
10	flight	flight	NOUN	NN	Number=Sing	8	obl	_	_
11	,	,	PUNCT	,	_	17	punct	_	_
12	because	because	SCONJ	IN	_	17	mark	_	_
13	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
14	legs	leg	NOUN	NNS	Number=Plur	17	nsubj	_	_
15	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	17	cop	_	_
16	too	too	ADV	RB	_	17	advmod	_	_
17	small	small	ADJ	JJ	Degree=Pos	2	advcl	_	_
18	and	and	CCONJ	CC	_	19	cc	_	_
19	light	light	ADJ	JJ	Degree=Pos	17	conj	_	_
20	to	to	PART	TO	_	21	mark	_	_
21	jump	jump	VERB	VB	VerbForm=Inf	17	advcl	_	_
22	up	up	ADV	RB	_	21	compound:prt	_	Agree=R7-rel-agree|Haiku=21:advmod
23	from	from	ADP	IN	_	25	case	_	_
24	the	the	DET	DT	Definite=Def|PronType=Art	25	det	_	_
25	ground	ground	NOUN	NN	Number=Sing	21	obl	_	_
26	like	like	ADP	IN	_	28	case	_	_
27	a	a	DET	DT	Definite=Ind|PronType=Art	28	det	_	_
28	bird	bird	NOUN	NN	Number=Sing	21	obl	_	_
29	.	.	PUNCT	.	_	2	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 | **take off** | present | Bats |  |  |  |  |  | vn remove-10.1 «NP V NP»: agent=Agent |
| 2 | **let** | gerund | Bats *not said here* |  |  |  |  |  | tree rules |
| 3 | **go** | infinitive | Bats *not said here* |  |  |  |  |  | vn disappearance-48.2-1 «NP V»: agent=Theme |
| 4 | **drop** | gerund | Bats *not said here* |  |  | flight |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme into flight=Trajectory |
| 5 | **is** | present | People's legs |  |  |  |  | small *property* | tree rules |
| 6 | **be** |  | People's legs *not said here* |  |  |  |  |  | tree rules |
| 7 | **jump up** | to-infinitive | People's legs *not said here* |  |  | the ground |  | like a bird | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme from ground=Trajectory |

<!-- .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:153-are-bats-blind.lesson:10`.

**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, R8-pos-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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