---
title: Identify the function of a substation. — Electricity at home and staying safe · tree and pragmatics
description: Identify the function of a substation. Exam question 2 of lesson 87 «Electricity at home and staying safe» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Exam question 2 · Electricity at home and staying safe

<!-- .ven lang=en -->
Identify the function of a substation.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you · **What happens:** identify · **To what, where:** function

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This is exam question 2 of lesson 87 «Electricity at home and staying safe» of the world 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/world/87-electricity-at-home-and-safety/#e2).

## The question {#question}

```conllu
# sent_id = question:world:87-electricity-at-home-and-safety:e2:1
# text = Identify the function of a substation.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	function	function	NOUN	NN	Number=Sing	1	obj	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	substation	substation	NOUN	NN	Number=Sing	3	nmod	_	SpaceAfter=No
7	.	.	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 function of a substation |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent function=Theme |

<!-- .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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
It lowers the voltage before electricity goes to homes

```conllu
# sent_id = question:world:87-electricity-at-home-and-safety:e2:o1:1
# text = It lowers the voltage before electricity goes to homes
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	lowers	lower	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	voltage	voltage	NOUN	NN	Number=Sing	2	obj	_	_
5	before	before	SCONJ	IN	_	7	mark	_	_
6	electricity	electricity	NOUN	NN	Number=Sing	7	nsubj	_	_
7	goes	go	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	_
8	to	to	ADP	IN	_	9	case	_	_
9	homes	home	NOUN	NNS	Number=Plur	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **lower** | present | It | the voltage |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent voltage=Theme |
| 2 | **go** | present | electricity |  |  | homes |  |  | vn escape-51.1-1 «NP V PP.initial\_location»: agent=Theme to home=Initial\_Location |

### Option 2 {#o2}

<!-- .ven lang=en -->
It manufactures electricity from wind

```conllu
# sent_id = question:world:87-electricity-at-home-and-safety:e2:o2:1
# text = It manufactures electricity from wind
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	manufactures	manufacture	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	electricity	electricity	NOUN	NN	Number=Sing	2	obj	_	_
4	from	from	ADP	IN	_	5	case	_	_
5	wind	wind	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **manufacture** | present | It | electricity |  | wind |  |  | vn create-26.4 «NP V NP PP.material»: agent=Agent electricity=Result from wind=Material |

### Option 3 {#o3}

<!-- .ven lang=en -->
It stores electricity for use at night

```conllu
# sent_id = question:world:87-electricity-at-home-and-safety:e2:o3:1
# text = It stores electricity for use at night
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	stores	store	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	electricity	electricity	NOUN	NN	Number=Sing	2	obj	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	use	use	NOUN	NN	Number=Sing	2	obl	_	_
6	at	at	ADP	IN	_	7	case	_	_
7	night	night	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **store** | present | It | electricity |  |  | night | for use | vn keep-15.2 «NP V NP»: agent=Agent electricity=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
It raises the voltage for use in homes

```conllu
# sent_id = question:world:87-electricity-at-home-and-safety:e2:o4:1
# text = It raises the voltage for use in homes
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	raises	raise	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	voltage	voltage	NOUN	NN	Number=Sing	2	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	use	use	NOUN	NN	Number=Sing	2	obl	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	homes	home	NOUN	NNS	Number=Plur	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **raise** | present | It | the voltage |  |  |  | for use in homes | vn put\_direction-9.4 «NP V NP»: agent=Agent voltage=Theme |

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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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