---
title: An indicator is a substance whose colour shows whether something is… — Indicators: the red-cabbage rainbow · tree and pragmatics
description: An indicator is a substance whose colour shows whether something is acidic or alkaline. Who acts: indicator, colour, something. 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 every clause.
---

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# Indicators: the red-cabbage rainbow, sentence 8

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An indicator is a substance whose colour shows whether something is acidic or alkaline.

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**Who acts:** indicator, colour, something · **What happens:** be, show · **To what, where:** substance · **Speech:** someone speaks here

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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 (indicator, colour, something), 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:8
# text = An indicator is a substance whose colour shows whether something is acidic or alkaline.
# 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): R8-pos-agree ×1
1	An	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	indicator	indicator	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	substance	substance	NOUN	NN	Number=Sing	0	root	_	_
6	whose	whose	PRON	WP$	Poss=Yes|PronType=Rel	7	nmod:poss	_	_
7	colour	colour	NOUN	NN	Number=Sing	8	nsubj	_	_
8	shows	show	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	acl:relcl	_	Agree=R8-pos-agree|Haiku=5:acl:relcl|HaikuPos=VERB:NNS:Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
9	whether	whether	SCONJ	IN	_	12	mark	_	_
10	something	something	PRON	NN	Number=Sing|PronType=Ind	12	nsubj	_	_
11	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	_	_
12	acidic	acidic	ADJ	JJ	Degree=Pos	8	ccomp	_	_
13	or	or	CCONJ	CC	_	14	cc	_	_
14	alkaline	alkaline	ADJ	JJ	Degree=Pos	12	conj	_	_
15	.	.	PUNCT	.	_	5	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 | **is a** | present | a indicator | a substance |  |  |  |  | tree rules |
| 2 | **show** | present | colour |  |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V»: agent=Agent |
| 3 | **is** | present | something |  |  |  |  | acidic *property* | tree rules |
| 4 | **be** |  | something *not said here* |  |  |  |  |  | tree rules |

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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:8`.

**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): R8-pos-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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