---
title: Scientists use indicators too: litmus paper, made from lichens, turn… — Indicators: the red-cabbage rainbow · tree and pragmatics
description: Scientists use indicators too: litmus paper, made from lichens, turns red in acid and blue in alkali. Who acts: Scientists, litmus paper. A sentence of the lesson «Indicators: the red-cabbage rainbow» of the chemistry course of Mova's primary school with its dependency tree and the pragmatics of eve
---

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# Indicators: the red-cabbage rainbow, sentence 5

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Scientists use indicators too: litmus paper, made from lichens, turns red in acid and blue in alkali.

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**Who acts:** Scientists, litmus paper · **What happens:** use, make, turn · **To what, where:** indicators, litmus paper, lichens

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This is a sentence of the lesson «Indicators: the red-cabbage rainbow» of the chemistry 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 (Scientists, litmus paper), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:017-indicators-the-red-cabbage-rainbow.lesson:5
# text = Scientists use indicators too: litmus paper, made from lichens, turns red in acid and blue in alkali.
# source = school lesson (ours)
# course = chemistry
# lesson = 017-indicators-the-red-cabbage-rainbow.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): no change
1	Scientists	scientist	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	use	use	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	indicators	indicator	NOUN	NNS	Number=Plur	2	obj	_	_
4	too	too	ADV	RB	_	2	advmod	_	_
5	:	:	PUNCT	:	_	7	punct	_	_
6	litmus	litmus	NOUN	NN	Number=Sing	7	compound	_	_
7	paper	paper	NOUN	NN	Number=Sing	13	nsubj	_	_
8	,	,	PUNCT	,	_	9	punct	_	_
9	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	acl	_	_
10	from	from	ADP	IN	_	11	case	_	_
11	lichens	lichen	NOUN	NNS	Number=Plur	9	obl	_	_
12	,	,	PUNCT	,	_	14	punct	_	_
13	turns	turn	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	parataxis	_	_
14	red	red	ADJ	JJ	Degree=Pos	13	xcomp	_	_
15	in	in	ADP	IN	_	16	case	_	_
16	acid	acid	NOUN	NN	Number=Sing	14	obl	_	_
17	and	and	CCONJ	CC	_	18	cc	_	_
18	blue	blue	ADJ	JJ	Degree=Pos	14	conj	_	_
19	in	in	ADP	IN	_	20	case	_	_
20	alkali	alkali	NOUN	NN	Number=Sing	18	obl	_	_
21	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use** | present | Scientists | indicators |  |  |  |  | vn eat-39.1 «NP V NP»: agent=Agent indicator=Patient |
| 2 | **make** | participle |  | litmus paper *not said here* |  | lichens |  |  | vn build-26.1-1 «NP.asset V PP»: agent=Asset from lichen=Material |
| 3 | **turn** | present | litmus paper |  |  |  |  | red *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |

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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:chemistry:017-indicators-the-red-cabbage-rainbow.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): no change. **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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