---
title: Why is a fluorescent vest useful for a road worker in the day but no… — Thinking like a lifeguard · tree and pragmatics
description: Why is a fluorescent vest useful for a road worker in the day but not enough at night? Test 8 · ★★★ of lesson 50 «Thinking like a lifeguard» of the everyday course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/everyday/50-thinking-about-outdoor-safety/t8/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Everyday](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/) / [Thinking like a lifeguard](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/50-thinking-about-outdoor-safety/) / t8

# Test 8 · ★★★ · Thinking like a lifeguard

<!-- .ven lang=en -->
Why is a fluorescent vest useful for a road worker in the day but not enough at night?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** fluorescent vest · **What happens:** be

<!-- .vabout -->
This is test 8 · ★★★ of lesson 50 «Thinking like a lifeguard» of the everyday course of Mova's primary school. 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/everyday/50-thinking-about-outdoor-safety/#t8).

## The question {#question}

```conllu
# sent_id = question:everyday:50-thinking-about-outdoor-safety:t8:1
# text = Why is a fluorescent vest useful for a road worker in the day but not enough at night?
1	Why	why	ADV	WRB	PronType=Int	6	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	fluorescent	fluorescent	ADJ	JJ	Degree=Pos	5	amod	_	_
5	vest	vest	NOUN	NN	Number=Sing	6	nsubj	_	_
6	useful	useful	ADJ	JJ	Degree=Pos	0	root	_	_
7	for	for	ADP	IN	_	10	case	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
9	road	road	NOUN	NN	Number=Sing	10	compound	_	_
10	worker	worker	NOUN	NN	Number=Sing	6	obl	_	_
11	in	in	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	day	day	NOUN	NN	Number=Sing	10	nmod	_	_
14	but	but	CCONJ	CC	_	16	cc	_	_
15	not	not	PART	RB	Polarity=Neg	16	advmod	_	_
16	enough	enough	ADJ	JJ	Degree=Pos	10	conj	_	_
17	at	at	ADP	IN	_	18	case	_	_
18	night	night	NOUN	NN	Number=Sing	16	obl	_	SpaceAfter=No
19	?	?	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | a fluorescent vest |  |  |  |  | for a road worker in the day; useful *property* | tree rules |

<!-- .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 -->
Fluorescent colours glow in daylight; at night reflectors return the headlights

```conllu
# sent_id = question:everyday:50-thinking-about-outdoor-safety:t8:o1:1
# text = Fluorescent colours glow in daylight; at night reflectors return the headlights
1	Fluorescent	fluorescent	ADJ	JJ	Degree=Pos	2	amod	_	_
2	colours	colour	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	glow	glow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	daylight	daylight	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
6	;	;	PUNCT	:	_	10	punct	_	_
7	at	at	ADP	IN	_	8	case	_	_
8	night	night	NOUN	NN	Number=Sing	9	compound	_	_
9	reflectors	reflector	NOUN	NNS	Number=Plur	10	nsubj	_	_
10	return	return	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	headlights	headlight	NOUN	NNS	Number=Plur	10	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **glow** | present | Fluorescent colours |  |  | daylight |  |  | vn light\_emission-43.1 «NP V PP.location»: agent=Theme in daylight=Location |
| 2 | **return** | present | night reflectors | the headlights |  |  |  |  | vn send-11.1 «NP V NP»: agent=Agent headlight=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
Road workers only work in the daytime

```conllu
# sent_id = question:everyday:50-thinking-about-outdoor-safety:t8:o2:1
# text = Road workers only work in the daytime
1	Road	road	NOUN	NN	Number=Sing	2	compound	_	_
2	workers	worker	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	only	only	ADV	RB	_	4	advmod	_	_
4	work	work	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	daytime	daytime	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **work** | present | Road workers |  |  |  |  | in the daytime | vn employment-95.3 «NP V PP.theme»: agent=Agent in daytime=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
Fluorescent colours glow brighter at night, when headlights shine on them from far away

<!-- fold The tree, 14 words -->
```conllu
# sent_id = question:everyday:50-thinking-about-outdoor-safety:t8:o3:1
# text = Fluorescent colours glow brighter at night, when headlights shine on them from far away
1	Fluorescent	fluorescent	ADJ	JJ	Degree=Pos	2	amod	_	_
2	colours	colour	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	glow	glow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	brighter	bright	ADJ	JJR	Degree=Cmp	3	xcomp	_	_
5	at	at	ADP	IN	_	6	case	_	_
6	night	night	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
7	,	,	PUNCT	,	_	10	punct	_	_
8	when	when	ADV	WRB	PronType=Int	10	advmod	_	_
9	headlights	headlight	NOUN	NNS	Number=Plur	10	nsubj	_	_
10	shine	shine	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
11	on	on	ADP	IN	_	12	case	_	_
12	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	10	obl	_	_
13	from	from	ADP	IN	_	14	case	_	_
14	far	far	ADV	RB	Degree=Pos	10	advmod	_	_
15	away	away	ADV	RB	_	14	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **glow** | present | Fluorescent colours |  |  |  | night | bright *property* | vn light\_emission-43.1 «NP V»: agent=Theme |
| 2 | **shine** | present | headlights |  |  |  |  | on colours *= colour*; far *property* | vn light\_emission-43.1 «NP V PP.location»: agent=Theme on they=Location |

### Option 4 {#o4}

<!-- .ven lang=en -->
Reflectors work only in sunshine

```conllu
# sent_id = question:everyday:50-thinking-about-outdoor-safety:t8:o4:1
# text = Reflectors work only in sunshine
1	Reflectors	reflector	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	work	work	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	only	only	ADV	RB	_	5	advmod	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	sunshine	sunshine	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **work** | present | Reflectors | sunshine |  |  |  |  | vn knead-26.5 «NP V NP.material»: agent=Agent sunshine=Material |

<!-- div src -->

**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.

<!-- /div -->

<!-- pn -->
- ← previous: [Thinking like a lifeguard, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/50-thinking-about-outdoor-safety/t7/)
- next →: [Thinking like a lifeguard, test 9](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/50-thinking-about-outdoor-safety/t9/)
- ↑ back to [Thinking like a lifeguard](https://md.mova.elamur.ai/free/en/corpora/questions/everyday/50-thinking-about-outdoor-safety/)