---
title: Hydrangeas turn blue in acidic soil and stay pink in alkaline soil. — Olympiad: everyday chemistry detectives ★★★ · tree and pragmatics
description: Hydrangeas turn blue in acidic soil and stay pink in alkaline soil. Who acts: Hydrangeas. A sentence of the lesson «Olympiad: everyday chemistry detectives ★★★» of the chemistry course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Olympiad: everyday chemistry detectives ★★★, sentence 15

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Hydrangeas turn blue in acidic soil and stay pink in alkaline soil.

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**Who acts:** Hydrangeas · **What happens:** turn, stay · **To what, where:** acidic soil, alkaline soil

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This is a sentence of the lesson «Olympiad: everyday chemistry detectives ★★★» 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 (Hydrangeas), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:037-olympiad-everyday-chemistry-detectives.lesson:15
# text = Hydrangeas turn blue in acidic soil and stay pink in alkaline soil.
# source = school lesson (ours)
# course = chemistry
# lesson = 037-olympiad-everyday-chemistry-detectives.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	Hydrangeas	hydrangea	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	turn	turn	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	blue	blue	ADJ	JJ	Degree=Pos	2	xcomp	_	_
4	in	in	ADP	IN	_	6	case	_	_
5	acidic	acidic	ADJ	JJ	Degree=Pos	6	amod	_	_
6	soil	soil	NOUN	NN	Number=Sing	2	obl	_	_
7	and	and	CCONJ	CC	_	8	cc	_	_
8	stay	stay	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	Agree=R8-pos-agree|Haiku=2:conj|HaikuPos=VERB:VB:VerbForm=Inf
9	pink	pink	ADJ	JJ	Degree=Pos	8	xcomp	_	_
10	in	in	ADP	IN	_	12	case	_	_
11	alkaline	alkaline	ADJ	JJ	Degree=Pos	12	amod	_	_
12	soil	soil	NOUN	NN	Number=Sing	8	obl	_	_
13	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | present | Hydrangeas |  |  | acidic soil |  | blue *property* | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme in soil=Trajectory |
| 2 | **stay** | present | Hydrangeas *not said here* |  |  | alkaline soil |  | pink *property* | vn exist-47.1 «NP V PP.location»: agent=Theme in soil=Location |

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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:037-olympiad-everyday-chemistry-detectives.lesson:15`.

**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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