---
title: Ascertain the approximate proportion of snake species that are serio… — Snakes to keep away from: cobras, mamb… · tree and pragmatics
description: Ascertain the approximate proportion of snake species that are seriously dangerous to human beings. Exam question 4 of lesson 322 «Snakes to keep away from: cobras, mambas, vipers and rattlesnakes» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the questio
---

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# Exam question 4 · Snakes to keep away from: cobras, mambas, vipers and rattl…

<!-- .ven lang=en -->
Ascertain the approximate proportion of snake species that are seriously dangerous to human beings.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you, snake species · **What happens:** ascertain, be · **To what, where:** approximate proportion

<!-- .vabout -->
This is exam question 4 of lesson 322 «Snakes to keep away from: cobras, mambas, vipers and rattlesnakes» 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/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes:e4:1
# text = Ascertain the approximate proportion of snake species that are seriously dangerous to human beings.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	approximate	approximate	ADJ	JJ	Degree=Pos	4	amod	_	_
4	proportion	proportion	NOUN	NN	Number=Sing	1	obj	_	_
5	of	of	ADP	IN	_	7	case	_	_
6	snake	snake	NOUN	NN	Number=Sing	7	compound	_	_
7	species	species	NOUN	NNS	Number=Plur	4	nmod	_	_
8	that	that	PRON	WDT	PronType=Rel	11	nsubj	_	_
9	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	11	cop	_	_
10	seriously	seriously	ADV	RB	_	11	advmod	_	_
11	dangerous	dangerous	ADJ	JJ	Degree=Pos	7	acl:relcl	_	_
12	to	to	ADP	IN	_	14	case	_	_
13	human	human	ADJ	JJ	Degree=Pos	14	amod	_	_
14	beings	being	NOUN	NNS	Number=Plur	11	obl	_	SpaceAfter=No
15	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the approximate proportion of snake species |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent proportion=Topic |
| 2 | **is** | present | snake species |  |  |  |  | to human beings; dangerous, seriously *property* | tree rules |

<!-- .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 -->
About two hundred out of some four thousand species

```conllu
# sent_id = question:biology:322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes:e4:o1:1
# text = About two hundred out of some four thousand species
1	About	about	ADV	RB	_	3	advmod	_	_
2	two	two	NUM	CD	NumForm=Word|NumType=Card	3	compound	_	_
3	hundred	hundred	NUM	CD	NumForm=Word|NumType=Card	0	root	_	_
4	out	out	ADP	IN	_	9	case	_	_
5	of	of	ADP	IN	_	9	case	_	_
6	some	some	DET	DT	PronType=Ind	9	det	_	_
7	four	four	NUM	CD	NumForm=Word|NumType=Card	8	compound	_	_
8	thousand	thousand	NUM	CD	NumForm=Word|NumType=Card	9	nummod	_	_
9	species	species	NOUN	NNS	Number=Plur	3	nmod	_	_
```

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

### Option 2 {#o2}

<!-- .ven lang=en -->
No species whatsoever

```conllu
# sent_id = question:biology:322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes:e4:o2:1
# text = No species whatsoever
1	No	no	DET	DT	PronType=Neg	2	det	_	_
2	species	species	NOUN	NNS	Number=Plur	0	root	_	_
3	whatsoever	whatsoever	ADV	RB	_	2	advmod	_	_
```

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

### Option 3 {#o3}

<!-- .ven lang=en -->
Every species without exception

```conllu
# sent_id = question:biology:322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes:e4:o3:1
# text = Every species without exception
1	Every	every	DET	DT	PronType=Tot	2	det	_	_
2	species	species	NOUN	NN	Number=Sing	0	root	_	_
3	without	without	ADP	IN	_	4	case	_	_
4	exception	exception	NOUN	NN	Number=Sing	2	nmod	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
About three thousand out of some four thousand species

```conllu
# sent_id = question:biology:322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes:e4:o4:1
# text = About three thousand out of some four thousand species
1	About	about	ADV	RB	_	3	advmod	_	_
2	three	three	NUM	CD	NumForm=Word|NumType=Card	3	compound	_	_
3	thousand	thousand	NUM	CD	NumForm=Word|NumType=Card	0	root	_	_
4	out	out	ADP	IN	_	9	case	_	_
5	of	of	ADP	IN	_	9	case	_	_
6	some	some	DET	DT	PronType=Ind	9	det	_	_
7	four	four	NUM	CD	NumForm=Word|NumType=Card	8	compound	_	_
8	thousand	thousand	NUM	CD	NumForm=Word|NumType=Card	9	nummod	_	_
9	species	species	NOUN	NNS	Number=Plur	3	nmod	_	_
```

<!-- .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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- ← previous: [Snakes to keep away from: cobras, mamb…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/e3/)
- next →: [Eagles: golden eagles, harpy eagles, S…, test 1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/323-eagles-golden-eagles-harpy-eagles-stellers-sea-eagles-and-eagle-eyes/t1/)
- ↑ back to [Snakes to keep away from: cobras, mambas, vipers and rattlesnakes](https://md.mova.elamur.ai/free/en/corpora/questions/biology/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/)