---
title: Light from a galaxy rushing away is stretched towards red, like a si… — How we know: measuring the sky · tree and pragmatics
description: Light from a galaxy rushing away is stretched towards red, like a siren dropping its pitch as an ambulance drives off: the bigger the stretch, the faster it goes. Who acts: galaxy, siren, ambulance. A sentence of the lesson «How we know: measuring the sky» of the space course of Mova's primary schoo
---

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# How we know: measuring the sky, sentence 5

<!-- .ven lang=en -->
Light from a galaxy rushing away is stretched towards red, like a siren dropping its pitch as an ambulance drives off: the bigger the stretch, the faster it goes.

<!-- .vintro -->
**Who acts:** galaxy, siren, ambulance · **What happens:** rush away, stretch, drop, drive off, go · **To what, where:** Light, pitch, bigger stretch

<!-- .vabout -->
This is a sentence of the lesson «How we know: measuring the sky» of the space 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 (galaxy, siren, ambulance), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:space:028-how-we-know-measuring-the-sky.lesson:5
# text = Light from a galaxy rushing away is stretched towards red, like a siren dropping its pitch as an ambulance drives off: the bigger the stretch, the faster it goes.
# source = school lesson (ours)
# course = space
# lesson = 028-how-we-know-measuring-the-sky.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): R5-strong ×1
1	Light	light	NOUN	NN	Number=Sing	8	nsubj:pass	_	_
2	from	from	ADP	IN	_	4	case	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	galaxy	galaxy	NOUN	NN	Number=Sing	1	nmod	_	_
5	rushing	rush	VERB	VBG	VerbForm=Ger	4	acl	_	_
6	away	away	ADV	RB	_	5	advmod	_	_
7	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	aux:pass	_	_
8	stretched	stretch	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
9	towards	towards	ADP	IN	_	10	case	_	_
10	red	red	ADJ	JJ	Degree=Pos	8	obl	_	_
11	,	,	PUNCT	,	_	15	punct	_	_
12	like	like	SCONJ	IN	_	15	mark	_	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
14	siren	siren	NOUN	NN	Number=Sing	15	nsubj	_	_
15	dropping	drop	VERB	VBG	Tense=Pres|VerbForm=Part	8	advcl	_	_
16	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	17	nmod:poss	_	_
17	pitch	pitch	NOUN	NN	Number=Sing	15	obj	_	_
18	as	as	SCONJ	IN	_	21	mark	_	_
19	an	a	DET	DT	Definite=Ind|PronType=Art	20	det	_	Agree=R5-strong|Haiku=21:det
20	ambulance	ambulance	NOUN	NN	Number=Sing	21	nsubj	_	_
21	drives	drive	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	15	advcl	_	_
22	off	off	ADP	RP	_	21	compound:prt	_	_
23	:	:	PUNCT	:	_	8	punct	_	_
24	the	the	DET	DT	Definite=Def|PronType=Art	25	det	_	_
25	bigger	big	ADJ	JJR	Degree=Cmp	27	amod	_	_
26	the	the	DET	DT	Definite=Def|PronType=Art	27	det	_	_
27	stretch	stretch	NOUN	NN	Number=Sing	32	obl	_	_
28	,	,	PUNCT	,	_	27	punct	_	_
29	the	the	DET	DT	Definite=Def|PronType=Art	30	det	_	_
30	faster	fast	ADV	RBR	Degree=Cmp	32	advmod	_	_
31	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	32	nsubj	_	_
32	goes	go	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	parataxis	_	_
33	.	.	PUNCT	.	_	8	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rush away** | gerund | a galaxy *not said here* |  |  |  |  | away *property* | vn run-51.3.2-2-1 «NP V»: agent=Theme |
| 2 | **stretch** | present · passive |  | Light from a galaxy |  |  |  | towards red | vn crane-40.3.2 «NP V NP PP.recipient»: subject=Patient towards red=Recipient |
| 3 | **drop** | gerund | a siren | siren's pitch |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent pitch=Theme |
| 4 | **drive off** | present | a ambulance |  |  |  |  |  | vn nonvehicle-51.4.2-1 «NP V PP»: agent=Theme |
| 5 | **go** | present | ambulance | the bigger stretch |  |  |  | fast *property* | vn disappearance-48.2-1 «NP V»: agent=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.

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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:space:028-how-we-know-measuring-the-sky.lesson:5`.

**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): R5-strong ×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/).

<!-- /div -->

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