---
title: Split starlight into a rainbow with a prism and you see thin dark li… — How we know: measuring the sky · tree and pragmatics
description: Split starlight into a rainbow with a prism and you see thin dark lines, like a barcode: each element (a basic kind of stuff, like hydrogen, helium or iron) leaves its own lines, so we can tell what a star is made of. Who acts: you, element, we. A sentence of the lesson «How we know: measuring the s
---

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# How we know: measuring the sky, sentence 4

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Split starlight into a rainbow with a prism and you see thin dark lines, like a barcode: each element (a basic kind of stuff, like hydrogen, helium or iron) leaves its own lines, so we can tell what a star is made of.

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**Who acts:** you, element, we · **What happens:** split, see, leave, tell, make · **To what, where:** starlight, rainbow, thin dark lines, own lines, star · **Speech:** someone speaks here

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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 (you, element, we), 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:4
# text = Split starlight into a rainbow with a prism and you see thin dark lines, like a barcode: each element (a basic kind of stuff, like hydrogen, helium or iron) leaves its own lines, so we can tell what a star is made of.
# 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 ×2, R7-rel-agree ×1
1	Split	split	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	starlight	starlight	NOUN	NN	Number=Sing	1	obj	_	_
3	into	into	ADP	IN	_	5	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	rainbow	rainbow	NOUN	NN	Number=Sing	1	obl	_	_
6	with	with	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	prism	prism	NOUN	NN	Number=Sing	5	nmod	_	_
9	and	and	CCONJ	CC	_	11	cc	_	_
10	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	11	nsubj	_	_
11	see	see	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	1	conj	_	_
12	thin	thin	ADJ	JJ	Degree=Pos	14	amod	_	_
13	dark	dark	ADJ	JJ	Degree=Pos	14	amod	_	_
14	lines	line	NOUN	NNS	Number=Plur	11	obj	_	_
15	,	,	PUNCT	,	_	18	punct	_	_
16	like	like	ADP	IN	_	18	case	_	_
17	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	_	_
18	barcode	barcode	NOUN	NN	Number=Sing	14	nmod	_	Agree=R5-strong|Haiku=1:obl
19	:	:	PUNCT	:	_	36	punct	_	_
20	each	each	DET	DT	PronType=Tot	21	det	_	_
21	element	element	NOUN	NN	Number=Sing	36	nsubj	_	_
22	(	(	PUNCT	-LRB-	_	25	punct	_	_
23	a	a	DET	DT	Definite=Ind|PronType=Art	25	det	_	_
24	basic	basic	ADJ	JJ	Degree=Pos	25	amod	_	_
25	kind	kind	NOUN	NN	Number=Sing	21	appos	_	_
26	of	of	ADP	IN	_	27	case	_	_
27	stuff	stuff	NOUN	NN	Number=Sing	25	nmod	_	_
28	,	,	PUNCT	,	_	30	punct	_	_
29	like	like	ADP	IN	_	30	case	_	_
30	hydrogen	hydrogen	NOUN	NN	Number=Sing	25	nmod	_	Agree=R7-rel-agree|Haiku=25:conj
31	,	,	PUNCT	,	_	32	punct	_	_
32	helium	helium	NOUN	NN	Number=Sing	30	conj	_	Agree=R5-strong|Haiku=25:conj
33	or	or	CCONJ	CC	_	34	cc	_	_
34	iron	iron	NOUN	NN	Number=Sing	25	conj	_	_
35	)	)	PUNCT	-RRB-	_	25	punct	_	_
36	leaves	leave	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	parataxis	_	_
37	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	39	nmod:poss	_	_
38	own	own	ADJ	JJ	Degree=Pos	39	amod	_	_
39	lines	line	NOUN	NNS	Number=Plur	36	obj	_	_
40	,	,	PUNCT	,	_	44	punct	_	_
41	so	so	ADV	RB	_	44	advmod	_	_
42	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	44	nsubj	_	_
43	can	can	AUX	MD	VerbForm=Fin	44	aux	_	_
44	tell	tell	VERB	VB	VerbForm=Inf	1	conj	_	_
45	what	what	DET	WDT	PronType=Int	47	det	_	_
46	a	a	DET	DT	Definite=Ind|PronType=Art	47	det	_	_
47	star	star	NOUN	NN	Number=Sing	49	nsubj:pass	_	_
48	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	49	aux:pass	_	_
49	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	44	ccomp	_	_
50	of	of	ADP	IN	_	49	obl	_	_
51	.	.	PUNCT	.	_	1	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: command
- act: request
- voice: narrator
- polarity: pos
- teacher: changed voice=narrator

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **split** | imperative | you *not said here* | starlight |  |  |  | into a rainbow with a prism *result* | vn break-45.1 «NP V NP PP.result»: agent=Agent starlight=Patient into rainbow=Result |
| 2 | **see** | present | you | thin dark lines |  |  |  | like a barcode | vn comprehend-87.2-1-1 «NP V NP»: agent=Experiencer line=Stimulus |
| 3 | **leave** | present | each element | element's own lines |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent line=Theme |
| 4 | **tell** *speech: assert* | can | we |  |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V how S»: agent=Agent clause=Topic |
| 5 | **make** | present · passive |  | what star |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: subject=Product |

<!-- .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:4`.

**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 ×2, 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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