---
title: Identify the species of snake that is the longest on the basis of re… — Big snakes: pythons, boas and anaconda… · tree and pragmatics
description: Identify the species of snake that is the longest on the basis of reliable measurements. Exam question 1 of lesson 321 «Big snakes: pythons, boas and anacondas, and how big they really get» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of
---

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# Exam question 1 · Big snakes: pythons, boas and anacondas, and how big they…

<!-- .ven lang=en -->
Identify the species of snake that is the longest on the basis of reliable measurements.

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you, snake · **What happens:** identify, be · **To what, where:** species, longest basis

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This is exam question 1 of lesson 321 «Big snakes: pythons, boas and anacondas, and how big they really get» 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/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/#e1).

## The question {#question}

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:e1:1
# text = Identify the species of snake that is the longest on the basis of reliable measurements.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	species	species	NOUN	NNS	Number=Plur	1	obj	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	snake	snake	NOUN	NN	Number=Sing	3	nmod	_	_
6	that	that	PRON	WDT	PronType=Rel	12	nsubj	_	_
7	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
9	longest	long	ADJ	JJS	Degree=Sup	12	amod	_	_
10	on	on	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	basis	basis	NOUN	NN	Number=Sing	5	acl:relcl	_	_
13	of	of	ADP	IN	_	15	case	_	_
14	reliable	reliable	ADJ	JJ	Degree=Pos	15	amod	_	_
15	measurements	measurement	NOUN	NNS	Number=Plur	12	nmod	_	SpaceAfter=No
16	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the species of snake |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent species=Theme |
| 2 | **is** | present | snake |  |  | the longest basis |  | of reliable measurements | 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 {#o1}

<!-- .ven lang=en -->
The king cobra, reliably measured at approximately ten metres

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:e1:o1:1
# text = The king cobra, reliably measured at approximately ten metres
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	king	king	NOUN	NN	Number=Sing	3	compound	_	_
3	cobra	cobra	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
4	,	,	PUNCT	,	_	6	punct	_	_
5	reliably	reliably	ADV	RB	_	6	advmod	_	_
6	measured	measure	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl	_	_
7	at	at	ADP	IN	_	10	case	_	_
8	approximately	approximately	ADV	RB	_	9	advmod	_	_
9	ten	ten	NUM	CD	NumForm=Word|NumType=Card	10	nummod	_	_
10	metres	metre	NOUN	NNS	Number=Plur	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **measure** | participle |  | the king cobra *not said here* |  | ten metres |  | reliably *property* | vn register-54.1-2-1 «NP V NP PP.value»: agent=Agent at metre=Value |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
The reticulated python, reliably measured at approximately seven metres

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:e1:o2:1
# text = The reticulated python, reliably measured at approximately seven metres
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	reticulated	reticulated	ADJ	JJ	Degree=Pos	3	amod	_	_
3	python	python	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
4	,	,	PUNCT	,	_	6	punct	_	_
5	reliably	reliably	ADV	RB	_	6	advmod	_	_
6	measured	measure	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl	_	_
7	at	at	ADP	IN	_	10	case	_	_
8	approximately	approximately	ADV	RB	_	9	advmod	_	_
9	seven	seven	NUM	CD	NumForm=Word|NumType=Card	10	nummod	_	_
10	metres	metre	NOUN	NNS	Number=Plur	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **measure** | participle |  | the reticulated python *not said here* |  | seven metres |  | reliably *property* | vn register-54.1-2-1 «NP V NP PP.value»: agent=Agent at metre=Value |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
The green anaconda, reliably measured at approximately fifteen metres

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:e1:o3:1
# text = The green anaconda, reliably measured at approximately fifteen metres
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	green	green	ADJ	JJ	Degree=Pos	3	amod	_	_
3	anaconda	anaconda	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
4	,	,	PUNCT	,	_	6	punct	_	_
5	reliably	reliably	ADV	RB	_	6	advmod	_	_
6	measured	measure	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl	_	_
7	at	at	ADP	IN	_	10	case	_	_
8	approximately	approximately	ADV	RB	_	9	advmod	_	_
9	fifteen	fifteen	NUM	CD	NumForm=Word|NumType=Card	10	nummod	_	_
10	metres	metre	NOUN	NNS	Number=Plur	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **measure** | participle |  | the green anaconda *not said here* |  | fifteen metres |  | reliably *property* | vn register-54.1-2-1 «NP V NP PP.value»: agent=Agent at metre=Value |

### Option 4 {#o4}

<!-- .ven lang=en -->
The black mamba, reliably measured at approximately nine metres

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:e1:o4:1
# text = The black mamba, reliably measured at approximately nine metres
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	black	black	ADJ	JJ	Degree=Pos	3	amod	_	_
3	mamba	mamba	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
4	,	,	PUNCT	,	_	6	punct	_	_
5	reliably	reliably	ADV	RB	_	6	advmod	_	_
6	measured	measure	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl	_	_
7	at	at	ADP	IN	_	10	case	_	_
8	approximately	approximately	ADV	RB	_	9	advmod	_	_
9	nine	nine	NUM	CD	NumForm=Word|NumType=Card	10	nummod	_	_
10	metres	metre	NOUN	NNS	Number=Plur	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **measure** | participle |  | the black mamba *not said here* |  | nine metres |  | reliably *property* | vn register-54.1-2-1 «NP V NP PP.value»: agent=Agent at metre=Value |

<!-- div src -->

**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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