---
title: Under the sea light fades fast, but sound travels well and quickly,… — Echolocation in the sea and in people: dolphins,… · tree and pragmatics
description: Under the sea light fades fast, but sound travels well and quickly, so an echo is often the best way to «see» there. Who acts: light, sound, echo. A sentence of the lesson «Echolocation in the sea and in people: dolphins, whales, swiftlets and clicking humans» of the biology course of Mova's primary
---

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# Echolocation in the sea and in people: dolphins, whales, swiftlets and clicking humans, sentence 1

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Under the sea light fades fast, but sound travels well and quickly, so an echo is often the best way to «see» there.

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**Who acts:** light, sound, echo · **What happens:** fade, travel, be, see · **To what, where:** best way

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This is a sentence of the lesson «Echolocation in the sea and in people: dolphins, whales, swiftlets and clicking humans» of the biology course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (light, sound, echo), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:230-echolocation-in-the-sea-and-in-people-dolphins-whales-swiftlets-and-clicking-humans.lesson:1
# text = Under the sea light fades fast, but sound travels well and quickly, so an echo is often the best way to «see» there.
# source = school lesson (ours)
# course = biology
# lesson = 230-echolocation-in-the-sea-and-in-people-dolphins-whales-swiftlets-and-clicking-humans.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R7-rel-agree ×1
1	Under	under	ADP	IN	_	3	case	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	sea	sea	NOUN	NN	Number=Sing	4	nmod	_	_
4	light	light	NOUN	NN	Number=Sing	5	nsubj	_	_
5	fades	fade	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	fast	fast	ADV	RB	Degree=Pos	5	advmod	_	_
7	,	,	PUNCT	,	_	10	punct	_	_
8	but	but	CCONJ	CC	_	10	cc	_	_
9	sound	sound	NOUN	NN	Number=Sing	10	nsubj	_	_
10	travels	travel	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	conj	_	_
11	well	well	ADV	RB	Degree=Pos	10	advmod	_	_
12	and	and	CCONJ	CC	_	13	cc	_	_
13	quickly	quickly	ADV	RB	_	11	conj	_	_
14	,	,	PUNCT	,	_	22	punct	_	_
15	so	so	ADV	RB	_	22	advmod	_	_
16	an	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
17	echo	echo	NOUN	NN	Number=Sing	22	nsubj	_	_
18	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	22	cop	_	_
19	often	often	ADV	RB	_	22	advmod	_	_
20	the	the	DET	DT	Definite=Def|PronType=Art	22	det	_	_
21	best	good	ADJ	JJS	Degree=Sup	22	amod	_	_
22	way	way	NOUN	NN	Number=Sing	5	parataxis	_	Agree=R7-rel-agree|Haiku=5:conj
23	to	to	PART	TO	_	25	mark	_	_
24	«	«	PUNCT	``	_	25	punct	_	_
25	see	see	VERB	VB	VerbForm=Inf	22	acl	_	_
26	»	»	PUNCT	''	_	25	punct	_	_
27	there	there	ADV	RB	PronType=Dem	25	advmod	_	_
28	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fade** | present | light under the sea |  |  |  |  | fast *property* | vn other\_cos-45.4 «NP.patient V»: agent=Patient |
| 2 | **travel** | present | sound |  |  |  |  | well *property* | vn run-51.3.2-1 «NP V»: agent=Theme |
| 3 | **is a** | present | a echo | the best way |  |  |  | often *property* | tree rules |
| 4 | **see** *in a quote* | to-infinitive | light under the sea *not said here* |  |  | there |  |  | vn comprehend-87.2-1-1 «NP V»: agent=Experiencer |

<!-- .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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:biology:230-echolocation-in-the-sea-and-in-people-dolphins-whales-swiftlets-and-clicking-humans.lesson:1`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R7-rel-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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