---
title: Count them: 6 bats hang in a row from a branch. Each bat holds on wi… — Echolocation: how bats see with sound · tree and pragmatics
description: Count them: 6 bats hang in a row from a branch. Each bat holds on with both feet. How many feet hold the branch, and how many wings are folded? Test 10 · ★★ of lesson 229 «Echolocation: how bats see with sound» of the biology course of Mova's primary school, with the dependency tree and pragmatics o
---

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# Test 10 · ★★ · Echolocation: how bats see with sound

<!-- .ven lang=en -->
Count them: 6 bats hang in a row from a branch. Each bat holds on with both feet. How many feet hold the branch, and how many wings are folded?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, 6 bats, bat, many feet · **What happens:** count, hang, hold on, hold, fold · **To what, where:** them, row, branch, many wings

<!-- .vabout -->
This is test 10 · ★★ of lesson 229 «Echolocation: how bats see with sound» of the biology course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/biology/229-echolocation-how-bats-see-with-sound/#t10).

## The question {#question}

<!-- .note -->
*Sentence 1:* Count them: 6 bats hang in a row from a branch.

```conllu
# sent_id = question:biology:229-echolocation-how-bats-see-with-sound:t10:1
# text = Count them: 6 bats hang in a row from a branch.
1	Count	count	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	1	obj	_	SpaceAfter=No
3	:	:	PUNCT	:	_	6	punct	_	_
4	6	6	NUM	CD	NumForm=Digit|NumType=Card	5	nummod	_	_
5	bats	bat	NOUN	NNS	Number=Plur	6	nsubj	_	_
6	hang	hang	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	1	parataxis	_	_
7	in	in	ADP	IN	_	9	case	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	row	row	NOUN	NN	Number=Sing	6	obl	_	_
10	from	from	ADP	IN	_	12	case	_	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
12	branch	branch	NOUN	NN	Number=Sing	6	obl	_	SpaceAfter=No
13	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **count** | imperative | you *not said here* | them *= they* |  |  |  |  | vn multiply-108 «NP V NP»: agent=Agent they=Theme |
| 2 | **hang** | present | 6 bats |  |  | a row |  | from a branch | vn assuming\_position-50 «NP V PP.location»: agent=Agent in row=Location |

<!-- .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.

<!-- .note -->
*Sentence 2:* Each bat holds on with both feet.

```conllu
# sent_id = question:biology:229-echolocation-how-bats-see-with-sound:t10:2
# text = Each bat holds on with both feet.
1	Each	each	DET	DT	PronType=Tot	2	det	_	_
2	bat	bat	NOUN	NN	Number=Sing	3	nsubj	_	_
3	holds	hold	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	on	on	ADP	RP	_	3	compound:prt	_	_
5	with	with	ADP	IN	_	7	case	_	_
6	both	both	DET	DT	PronType=Tot	7	det	_	_
7	feet	foot	NOUN	NNS	Number=Plur	3	obl	_	SpaceAfter=No
8	.	.	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hold on** | present | each bat |  |  |  |  | with both feet | vn exist-47.1 «NP V»: agent=Theme |

<!-- .note -->
*Sentence 3:* How many feet hold the branch, and how many wings are folded?

```conllu
# sent_id = question:biology:229-echolocation-how-bats-see-with-sound:t10:3
# text = How many feet hold the branch, and how many wings are folded?
1	How	how	ADV	WRB	PronType=Int	2	advmod	_	_
2	many	many	ADJ	JJ	Degree=Pos	3	amod	_	_
3	feet	foot	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	hold	hold	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	branch	branch	NOUN	NN	Number=Sing	4	obj	_	SpaceAfter=No
7	,	,	PUNCT	,	_	13	punct	_	_
8	and	and	CCONJ	CC	_	13	cc	_	_
9	how	how	ADV	WRB	PronType=Int	10	advmod	_	_
10	many	many	ADJ	JJ	Degree=Pos	11	amod	_	_
11	wings	wing	NOUN	NNS	Number=Plur	13	nsubj:pass	_	_
12	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	13	aux:pass	_	_
13	folded	fold	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	conj	_	SpaceAfter=No
14	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hold** | present | many feet | the branch |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent branch=Theme |
| 2 | **fold** | present · passive |  | many wings |  |  |  |  | vn bend-45.2 «NP V NP.patient»: subject=Patient |

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
6 feet and 6 wings

```conllu
# sent_id = question:biology:229-echolocation-how-bats-see-with-sound:t10:o1:1
# text = 6 feet and 6 wings
1	6	6	NUM	CD	NumForm=Digit|NumType=Card	2	nummod	_	_
2	feet	foot	NOUN	NNS	Number=Plur	0	root	_	_
3	and	and	CCONJ	CC	_	5	cc	_	_
4	6	6	NUM	CD	NumForm=Digit|NumType=Card	5	nummod	_	_
5	wings	wing	NOUN	NNS	Number=Plur	2	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 {#o2}

<!-- .ven lang=en -->
24 feet and 12 wings

```conllu
# sent_id = question:biology:229-echolocation-how-bats-see-with-sound:t10:o2:1
# text = 24 feet and 12 wings
1	24	24	NUM	CD	NumForm=Digit|NumType=Card	2	nummod	_	_
2	feet	foot	NOUN	NNS	Number=Plur	0	root	_	_
3	and	and	CCONJ	CC	_	5	cc	_	_
4	12	12	NUM	CD	NumForm=Digit|NumType=Card	5	nummod	_	_
5	wings	wing	NOUN	NNS	Number=Plur	2	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
12 feet and 12 wings

```conllu
# sent_id = question:biology:229-echolocation-how-bats-see-with-sound:t10:o3:1
# text = 12 feet and 12 wings
1	12	12	NUM	CD	NumForm=Digit|NumType=Card	2	nummod	_	_
2	feet	foot	NOUN	NNS	Number=Plur	0	root	_	_
3	and	and	CCONJ	CC	_	5	cc	_	_
4	12	12	NUM	CD	NumForm=Digit|NumType=Card	5	nummod	_	_
5	wings	wing	NOUN	NNS	Number=Plur	2	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
12 feet and 24 wings

```conllu
# sent_id = question:biology:229-echolocation-how-bats-see-with-sound:t10:o4:1
# text = 12 feet and 24 wings
1	12	12	NUM	CD	NumForm=Digit|NumType=Card	2	nummod	_	_
2	feet	foot	NOUN	NNS	Number=Plur	0	root	_	_
3	and	and	CCONJ	CC	_	5	cc	_	_
4	24	24	NUM	CD	NumForm=Digit|NumType=Card	5	nummod	_	_
5	wings	wing	NOUN	NNS	Number=Plur	2	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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