---
title: Count them: a python has 300 backbones and almost every one has two… — Big snakes: pythons, boas and anaconda… · tree and pragmatics
description: Count them: a python has 300 backbones and almost every one has two ribs. About how many ribs is that? Test 3 · ★ 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 questi
---

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# Test 3 · ★ · Big snakes: pythons, boas and anacondas, and how big they…

<!-- .ven lang=en -->
Count them: a python has 300 backbones and almost every one has two ribs. About how many ribs is that?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, python, one, that · **What happens:** count, have, be · **To what, where:** them, 300 backbones, two ribs

<!-- .vabout -->
This is test 3 · ★ of lesson 321 «Big snakes: pythons, boas and anacondas, and how big they really get» 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/321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get/#t3).

## The question {#question}

<!-- .note -->
*Sentence 1:* Count them: a python has 300 backbones and almost every one has two ribs.

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:t3:1
# text = Count them: a python has 300 backbones and almost every one has two ribs.
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	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	python	python	NOUN	NN	Number=Sing	6	nsubj	_	_
6	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	parataxis	_	_
7	300	300	NUM	CD	NumForm=Digit|NumType=Card	8	nummod	_	_
8	backbones	backbone	NOUN	NNS	Number=Plur	6	obj	_	_
9	and	and	CCONJ	CC	_	13	cc	_	_
10	almost	almost	ADV	RB	_	13	advmod	_	_
11	every	every	DET	DT	PronType=Tot	12	det	_	_
12	one	one	NOUN	NN	Number=Sing	13	nsubj	_	_
13	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	conj	_	_
14	two	two	NUM	CD	NumForm=Word|NumType=Card	15	nummod	_	_
15	ribs	rib	NOUN	NNS	Number=Plur	13	obj	_	SpaceAfter=No
16	.	.	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 | **have** | present | a python | 300 backbones |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent backbone=Patient |
| 3 | **have** | present | every one | two ribs |  |  |  | almost *property* | vn birth-28.2-1 «NP V NP»: agent=Agent rib=Patient |

<!-- .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:* About how many ribs is that?

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:t3:2
# text = About how many ribs is that?
1	About	about	ADP	IN	_	4	case	_	_
2	how	how	ADV	WRB	PronType=Int	3	advmod	_	_
3	many	many	ADJ	JJ	Degree=Pos	4	amod	_	_
4	ribs	rib	NOUN	NNS	Number=Plur	5	obl	_	_
5	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	that	that	PRON	DT	Number=Sing|PronType=Dem	5	nsubj	_	SpaceAfter=No
7	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **be** | present | that |  |  |  |  | about many ribs | vn exist-47.1 «NP V PP.location»: agent=Theme about rib=Location |

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Only about 150

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:t3:o1:1
# text = Only about 150
1	Only	only	ADV	RB	_	3	advmod	_	_
2	about	about	ADV	RB	_	3	advmod	_	_
3	150	150	NUM	CD	NumForm=Digit|NumType=Card	0	root	_	_
```

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

### Option 2 {#o2}

<!-- .ven lang=en -->
Only about 300

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:t3:o2:1
# text = Only about 300
1	Only	only	ADV	RB	_	3	advmod	_	_
2	about	about	ADV	RB	_	3	advmod	_	_
3	300	300	NUM	CD	NumForm=Digit|NumType=Card	0	root	_	_
```

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

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

<!-- .ven lang=en -->
About 600

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:t3:o3:1
# text = About 600
1	About	about	ADV	RB	_	2	advmod	_	_
2	600	600	NUM	CD	NumForm=Digit|NumType=Card	0	root	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
Only about 33

```conllu
# sent_id = question:biology:321-big-snakes-pythons-boas-and-anacondas-and-how-big-they-really-get:t3:o4:1
# text = Only about 33
1	Only	only	ADV	RB	_	3	advmod	_	_
2	about	about	ADV	RB	_	3	advmod	_	_
3	33	33	NUM	CD	NumForm=Digit|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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