---
title: Identify the bulb which gives equal light with far less electricity. — Saving water and energy at home · tree and pragmatics
description: Identify the bulb which gives equal light with far less electricity. Exam question 2 of lesson 89 «Saving water and energy at home» 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 wrong.
---

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# Exam question 2 · Saving water and energy at home

<!-- .ven lang=en -->
Identify the bulb which gives equal light with far less electricity.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, bulb · **What happens:** identify, give · **To what, where:** bulb, equal light

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This is exam question 2 of lesson 89 «Saving water and energy at home» 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/89-saving-water-and-energy/#e2).

## The question {#question}

```conllu
# sent_id = question:world:89-saving-water-and-energy:e2:1
# text = Identify the bulb which gives equal light with far less electricity.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	bulb	bulb	NOUN	NN	Number=Sing	1	obj	_	_
4	which	which	PRON	WDT	PronType=Rel	5	nsubj	_	_
5	gives	give	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	acl:relcl	_	_
6	equal	equal	ADJ	JJ	Degree=Pos	7	amod	_	_
7	light	light	NOUN	NN	Number=Sing	5	obj	_	_
8	with	with	ADP	IN	_	11	case	_	_
9	far	far	ADV	RB	Degree=Pos	10	advmod	_	_
10	less	less	ADJ	JJR	Degree=Cmp	11	amod	_	_
11	electricity	electricity	NOUN	NN	Number=Sing	5	obl	_	SpaceAfter=No
12	.	.	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 bulb |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent bulb=Theme |
| 2 | **give** | present | the bulb | equal light |  |  |  | with less electricity | vn give-13.1-1 «NP V NP»: agent=Agent light=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 {#o1}

<!-- .ven lang=en -->
An old filament bulb

```conllu
# sent_id = question:world:89-saving-water-and-energy:e2:o1:1
# text = An old filament bulb
1	An	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
2	old	old	ADJ	JJ	Degree=Pos	4	amod	_	_
3	filament	filament	NOUN	NN	Number=Sing	4	compound	_	_
4	bulb	bulb	NOUN	NN	Number=Sing	0	root	_	_
```

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

### Option 2 {#o2}

<!-- .ven lang=en -->
A coloured glass bulb

```conllu
# sent_id = question:world:89-saving-water-and-energy:e2:o2:1
# text = A coloured glass bulb
1	A	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
2	coloured	coloured	ADJ	JJ	Degree=Pos	4	amod	_	_
3	glass	glass	NOUN	NN	Number=Sing	4	compound	_	_
4	bulb	bulb	NOUN	NN	Number=Sing	0	root	_	_
```

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

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
An LED bulb

```conllu
# sent_id = question:world:89-saving-water-and-energy:e2:o3:1
# text = An LED bulb
1	An	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	LED	led	NOUN	NN	Number=Sing	3	compound	_	_
3	bulb	bulb	NOUN	NN	Number=Sing	0	root	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
A bulb of greater power

```conllu
# sent_id = question:world:89-saving-water-and-energy:e2:o4:1
# text = A bulb of greater power
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	bulb	bulb	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	greater	great	ADJ	JJR	Degree=Cmp	5	amod	_	_
5	power	power	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .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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- ← previous: [Saving water and energy at home, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/world/89-saving-water-and-energy/e1/)
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