---
title: Why can a fibre-optic cable carry so much information so fast? — Inventions, computers and the internet · tree and pragmatics
description: Why can a fibre-optic cable carry so much information so fast? Test 4 · ★★ of lesson 59 «Inventions, computers and the internet» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Test 4 · ★★ · Inventions, computers and the internet

<!-- .ven lang=en -->
Why can a fibre-optic cable carry so much information so fast?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **Who acts:** fibre optic cable · **What happens:** carry · **To what, where:** much information

<!-- .vabout -->
This is test 4 · ★★ of lesson 59 «Inventions, computers and the internet» of the world 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/world/59-inventions-computers-internet/#t4).

## The question {#question}

```conllu
# sent_id = question:world:59-inventions-computers-internet:t4:1
# text = Why can a fibre-optic cable carry so much information so fast?
1	Why	why	ADV	WRB	PronType=Int	8	advmod	_	_
2	can	can	AUX	MD	VerbForm=Fin	8	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
4	fibre	fibre	NOUN	NN	Number=Sing	7	compound	_	SpaceAfter=No
5	-	-	PUNCT	HYPH	_	4	punct	_	SpaceAfter=No
6	optic	optic	ADJ	JJ	Degree=Pos	7	amod	_	_
7	cable	cable	NOUN	NN	Number=Sing	8	nsubj	_	_
8	carry	carry	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	so	so	ADV	RB	_	10	advmod	_	_
10	much	much	ADJ	JJ	Degree=Pos	11	amod	_	_
11	information	information	NOUN	NN	Number=Sing	8	obj	_	_
12	so	so	ADV	RB	_	13	advmod	_	_
13	fast	fast	ADV	RB	Degree=Pos	8	advmod	_	SpaceAfter=No
14	?	?	PUNCT	.	_	8	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **carry** | can | a fibre optic cable | much information |  |  |  | fast *property* | vn carry-11.4 «NP V NP»: agent=Agent information=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 -->
It is much thicker than a copper wire

```conllu
# sent_id = question:world:59-inventions-computers-internet:t4:o1:1
# text = It is much thicker than a copper wire
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	much	much	ADV	RB	_	4	advmod	_	_
4	thicker	thick	ADJ	JJR	Degree=Cmp	0	root	_	_
5	than	than	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	copper	copper	NOUN	NN	Number=Sing	8	compound	_	_
8	wire	wire	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | It |  |  |  |  | than a copper wire; thick *property* | tree rules |

### Option 2 · ← Mova's choice · ✓ the right answer {#o2}

<!-- .ven lang=en -->
It uses flashes of light

```conllu
# sent_id = question:world:59-inventions-computers-internet:t4:o2:1
# text = It uses flashes of light
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	uses	use	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	flashes	flash	NOUN	NNS	Number=Plur	2	obj	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	light	light	NOUN	NN	Number=Sing	3	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use** | present | It | flashes of light |  |  |  |  | vn eat-39.1 «NP V NP»: agent=Agent flash=Patient |
| 2 | **flash** |  | light |  |  |  |  |  | nom flash «event intransitive»: of=agent |

### Option 3 {#o3}

<!-- .ven lang=en -->
It uses sound, which is faster than light

```conllu
# sent_id = question:world:59-inventions-computers-internet:t4:o3:1
# text = It uses sound, which is faster than light
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	uses	use	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	sound	sound	NOUN	NN	Number=Sing	2	obj	_	SpaceAfter=No
4	,	,	PUNCT	,	_	7	punct	_	_
5	which	which	PRON	WDT	PronType=Rel	7	nsubj	_	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
7	faster	fast	ADJ	JJR	Degree=Cmp	3	amod	_	_
8	than	than	ADP	IN	_	9	case	_	_
9	light	light	NOUN	NN	Number=Sing	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use** | present | It | sound |  |  |  |  | vn eat-39.1 «NP V NP»: agent=Agent sound=Patient |
| 2 | **is** | present | sound |  |  |  |  | than light; fast *property* | tree rules |

### Option 4 {#o4}

<!-- .ven lang=en -->
It is filled with very fast water

```conllu
# sent_id = question:world:59-inventions-computers-internet:t4:o4:1
# text = It is filled with very fast water
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	filled	fill	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	with	with	ADP	IN	_	7	case	_	_
5	very	very	ADV	RB	_	6	advmod	_	_
6	fast	fast	ADJ	JJ	Degree=Pos	7	amod	_	_
7	water	water	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fill** | present · passive |  | It |  |  |  | with fast water | vn other\_cos-45.4 «NP V NP PP.instrument»: subject=Patient with water=Instrument |

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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.

<!-- /div -->

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