---
title: Identify the substance principally responsible for the sour taste of… — Acids in the kitchen · tree and pragmatics
description: Identify the substance principally responsible for the sour taste of the lemon. Exam question 1 of lesson 15 «Acids in the kitchen» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Exam question 1 · Acids in the kitchen

<!-- .ven lang=en -->
Identify the substance principally responsible for the sour taste of the lemon.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **Who acts:** you · **What happens:** identify, taste · **To what, where:** substance, lemon

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This is exam question 1 of lesson 15 «Acids in the kitchen» of the chemistry course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/chemistry/15-acids-in-the-kitchen/#e1).

## The question {#question}

```conllu
# sent_id = question:chemistry:15-acids-in-the-kitchen:e1:1
# text = Identify the substance principally responsible for the sour taste of the lemon.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	substance	substance	NOUN	NN	Number=Sing	1	obj	_	_
4	principally	principally	ADV	RB	_	5	advmod	_	_
5	responsible	responsible	ADJ	JJ	Degree=Pos	3	amod	_	_
6	for	for	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	sour	sour	ADJ	JJ	Degree=Pos	9	amod	_	_
9	taste	taste	NOUN	NN	Number=Sing	5	obl	_	_
10	of	of	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	lemon	lemon	NOUN	NN	Number=Sing	9	nmod	_	SpaceAfter=No
13	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the substance |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent substance=Theme |
| 2 | **taste** |  |  | the lemon |  |  |  |  | nom taste «cognition transitive»: of=patient |

<!-- .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.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Acetic acid

```conllu
# sent_id = question:chemistry:15-acids-in-the-kitchen:e1:o1:1
# text = Acetic acid
1	Acetic	acetic	ADJ	JJ	Degree=Pos	2	amod	_	_
2	acid	acid	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 {#o2}

<!-- .ven lang=en -->
Formic acid

```conllu
# sent_id = question:chemistry:15-acids-in-the-kitchen:e1:o2:1
# text = Formic acid
1	Formic	formic	ADJ	JJ	Degree=Pos	2	amod	_	_
2	acid	acid	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 {#o3}

<!-- .ven lang=en -->
Lactic acid

```conllu
# sent_id = question:chemistry:15-acids-in-the-kitchen:e1:o3:1
# text = Lactic acid
1	Lactic	lactic	ADJ	JJ	Degree=Pos	2	amod	_	_
2	acid	acid	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
Citric acid

```conllu
# sent_id = question:chemistry:15-acids-in-the-kitchen:e1:o4:1
# text = Citric acid
1	Citric	citric	ADJ	JJ	Degree=Pos	2	amod	_	_
2	acid	acid	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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