---
title: Given that each of four bats possesses the customary number of wings… — Myth check: are bats blind? · tree and pragmatics
description: Given that each of four bats possesses the customary number of wings, determine the aggregate number of wings. Exam question 4 of lesson 153 «Myth check: are bats blind?» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova'
---

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# Exam question 4 · Myth check: are bats blind?

<!-- .ven lang=en -->
Given that each of four bats possesses the customary number of wings, determine the aggregate number of wings.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** each, you · **What happens:** give, possess, determine · **To what, where:** customary number, aggregate number

<!-- .vabout -->
This is exam question 4 of lesson 153 «Myth check: are bats blind?» of the biology course of Mova's primary school, asked in stiff, formal language. 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/153-are-bats-blind/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:153-are-bats-blind:e4:1
# text = Given that each of four bats possesses the customary number of wings, determine the aggregate number of wings.
1	Given	give	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	mark	_	_
2	that	that	SCONJ	IN	_	7	mark	_	_
3	each	each	DET	DT	PronType=Tot	7	nsubj	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	four	four	NUM	CD	NumForm=Word|NumType=Card	6	nummod	_	_
6	bats	bat	NOUN	NNS	Number=Plur	3	nmod	_	_
7	possesses	possess	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	advcl	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
9	customary	customary	NOUN	NN	Number=Sing	10	compound	_	_
10	number	number	NOUN	NN	Number=Sing	7	obj	_	_
11	of	of	ADP	IN	_	12	case	_	_
12	wings	wing	NOUN	NNS	Number=Plur	10	nmod	_	SpaceAfter=No
13	,	,	PUNCT	,	_	14	punct	_	_
14	determine	determine	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
16	aggregate	aggregate	NOUN	NN	Number=Sing	17	compound	_	_
17	number	number	NOUN	NN	Number=Sing	14	obj	_	_
18	of	of	ADP	IN	_	19	case	_	_
19	wings	wing	NOUN	NNS	Number=Plur	17	nmod	_	SpaceAfter=No
20	.	.	PUNCT	.	_	14	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **give** | participle |  |  |  |  |  |  | vn break\_down-45.8 «NP V»: agent=Patient |
| 2 | **possess** | present | each | the customary number of wings |  |  |  |  | vn own-100.1 «NP V NP»: agent=Pivot number=Theme |
| 3 | **determine** | imperative | you *not said here* | the aggregate number of wings |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent number=Topic |

<!-- .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.

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Eight

```conllu
# sent_id = question:biology:153-are-bats-blind:e4:o1:1
# text = Eight
1	Eight	eight	NUM	CD	NumForm=Word|NumType=Card	0	root	_	_
```

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

### Option 2 {#o2}

<!-- .ven lang=en -->
Sixteen

```conllu
# sent_id = question:biology:153-are-bats-blind:e4:o2:1
# text = Sixteen
1	Sixteen	sixteen	NUM	CD	NumForm=Word|NumType=Card	0	root	_	_
```

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

### Option 3 {#o3}

<!-- .ven lang=en -->
Twelve

```conllu
# sent_id = question:biology:153-are-bats-blind:e4:o3:1
# text = Twelve
1	Twelve	twelve	NUM	CD	NumForm=Word|NumType=Card	0	root	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
Four

```conllu
# sent_id = question:biology:153-are-bats-blind:e4:o4:1
# text = Four
1	Four	four	NUM	CD	NumForm=Word|NumType=Card	0	root	_	_
```

<!-- .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.

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