---
title: Why can scientists not reach the bottom of the deepest parts of the… — The Congo river: tigerfish, the deepes… · tree and pragmatics
description: Why can scientists not reach the bottom of the deepest parts of the Congo with a pole? Test 12 of lesson 160 «The Congo river: tigerfish, the deepest river, lungfish and hidden birds» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each 
---

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# Test 12 · The Congo river: tigerfish, the deepest river, lungfish an…

<!-- .ven lang=en -->
Why can scientists not reach the bottom of the deepest parts of the Congo with a pole?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 4 · wrong ✗ · **Who acts:** scientists · **What happens:** not reach · **To what, where:** bottom

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This is test 12 of lesson 160 «The Congo river: tigerfish, the deepest river, lungfish and hidden birds» 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/160-the-congo-river/#t12).

## The question {#question}

```conllu
# sent_id = question:biology:160-the-congo-river:t12:1
# text = Why can scientists not reach the bottom of the deepest parts of the Congo with a pole?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	can	can	AUX	MD	VerbForm=Fin	5	aux	_	_
3	scientists	scientist	NOUN	NNS	Number=Plur	5	nsubj	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	reach	reach	VERB	VB	VerbForm=Inf	0	root	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	bottom	bottom	NOUN	NN	Number=Sing	5	obj	_	_
8	of	of	ADP	IN	_	11	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	deepest	deep	ADJ	JJS	Degree=Sup	11	amod	_	_
11	parts	part	NOUN	NNS	Number=Plur	7	nmod	_	_
12	of	of	ADP	IN	_	14	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	Congo	Congo	PROPN	NNP	Number=Sing	11	nmod	_	_
15	with	with	ADP	IN	_	17	case	_	_
16	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
17	pole	pole	NOUN	NN	Number=Sing	5	obl	_	SpaceAfter=No
18	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **reach** | can | scientists | the bottom of the deepest parts of the Congo |  |  |  | with a pole | vn body\_motion-49.2-1-1 «NP V NP ADV»: agent=Agent bottom=Theme |

<!-- .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 -->
Tigerfish bite the poles

```conllu
# sent_id = question:biology:160-the-congo-river:t12:o1:1
# text = Tigerfish bite the poles
1	Tigerfish	tigerfish	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	bite	bite	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	poles	pole	NOUN	NNS	Number=Plur	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **bite** | present | Tigerfish | the poles |  |  |  |  | vn swat-18.2 «NP V NP»: agent=Agent pole=Patient |

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
The bottom of the river is made of soft mud that swallows the poles

```conllu
# sent_id = question:biology:160-the-congo-river:t12:o2:1
# text = The bottom of the river is made of soft mud that swallows the poles
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	bottom	bottom	NOUN	NN	Number=Sing	7	nsubj:pass	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	river	river	NOUN	NN	Number=Sing	2	nmod	_	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux:pass	_	_
7	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
8	of	of	ADP	IN	_	10	case	_	_
9	soft	soft	ADJ	JJ	Degree=Pos	10	amod	_	_
10	mud	mud	NOUN	NN	Number=Sing	7	obl	_	_
11	that	that	PRON	WDT	PronType=Rel	12	nsubj	_	_
12	swallows	swallow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	acl:relcl	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	poles	pole	NOUN	NNS	Number=Plur	12	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present · passive |  | the bottom of the river |  |  |  | of soft mud | vn build-26.1-1 «NP.asset V NP»: subject=Product |
| 2 | **swallow** | present | soft mud | the poles |  |  |  |  | vn gobble-39.3 «NP V NP»: agent=Agent pole=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
The water flows uphill

```conllu
# sent_id = question:biology:160-the-congo-river:t12:o3:1
# text = The water flows uphill
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	water	water	NOUN	NN	Number=Sing	3	nsubj	_	_
3	flows	flow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	uphill	uphill	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **flow** | present | the water |  |  |  |  | uphill *property* | vn appear-48.1.1 «NP V»: agent=Theme |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
The river is more than two hundred metres deep there

```conllu
# sent_id = question:biology:160-the-congo-river:t12:o4:1
# text = The river is more than two hundred metres deep there
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	river	river	NOUN	NN	Number=Sing	4	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	more	more	ADJ	JJR	Degree=Cmp	7	advmod	_	_
5	than	than	ADP	IN	_	4	fixed	_	_
6	two	two	NUM	CD	NumForm=Word|NumType=Card	7	compound	_	_
7	hundred	hundred	NUM	CD	NumForm=Word|NumType=Card	8	nummod	_	_
8	metres	metre	NOUN	NNS	Number=Plur	0	root	_	_
9	deep	deep	ADV	RB	_	10	advmod	_	_
10	there	there	ADV	RB	PronType=Dem	8	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | the river |  |  |  |  | more *property* | tree rules |

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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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