---
title: Bikes at night need a white light at the front and a red light at th… — Riding a bike or a scooter safely · tree and pragmatics
description: Bikes at night need a white light at the front and a red light at the back. Who acts: Bikes. A sentence of the lesson «Riding a bike or a scooter safely» of the everyday course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Riding a bike or a scooter safely, sentence 14

<!-- .ven lang=en -->
Bikes at night need a white light at the front and a red light at the back.

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**Who acts:** Bikes · **What happens:** need · **To what, where:** white light, front

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This is a sentence of the lesson «Riding a bike or a scooter safely» of the everyday 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 (Bikes), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:005-bikes-and-scooters.lesson:14
# text = Bikes at night need a white light at the front and a red light at the back.
# source = school lesson (ours)
# course = everyday
# lesson = 005-bikes-and-scooters.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): R1-cc-next ×1, R5-strong ×1
1	Bikes	bike	NOUN	NNS	Number=Plur	4	nsubj	_	_
2	at	at	ADP	IN	_	3	case	_	_
3	night	night	NOUN	NN	Number=Sing	1	nmod	_	_
4	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	white	white	ADJ	JJ	Degree=Pos	7	amod	_	_
7	light	light	NOUN	NN	Number=Sing	4	obj	_	_
8	at	at	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	front	front	NOUN	NN	Number=Sing	4	obl	_	_
11	and	and	CCONJ	CC	_	14	cc	_	Agree=R1-cc-next|Haiku=10:cc
12	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
13	red	red	ADJ	JJ	Degree=Pos	14	amod	_	_
14	light	light	NOUN	NN	Number=Sing	7	conj	_	Agree=R5-strong|Haiku=10:conj
15	at	at	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	back	back	NOUN	NN	Number=Sing	14	nmod	_	_
18	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | Bikes at night | a white light and a red light at the back |  | the front |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot light=Theme |

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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:everyday:005-bikes-and-scooters.lesson:14`.

**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): R1-cc-next ×1, R5-strong ×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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- ← previous: [Riding a bike or a scooter safely, 13](https://md.mova.elamur.ai/free/en/corpora/school/everyday/5-bikes-and-scooters/13/)
- next →: [Riding a bike or a scooter safely, 15](https://md.mova.elamur.ai/free/en/corpora/school/everyday/5-bikes-and-scooters/15/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/everyday/5-bikes-and-scooters/)