---
title: Carbon monoxide is a poisonous gas with no colour and no smell, so h… — Thinking it through: the science behind home saf… · tree and pragmatics
description: Carbon monoxide is a poisonous gas with no colour and no smell, so homes with fuel-burning heaters or boilers need a carbon monoxide alarm. Who acts: Carbon monoxide, homes. A sentence of the lesson «Thinking it through: the science behind home safety» of the everyday course of Mova's primary school
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/everyday/40-home-safety-reasoning/26/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Everyday](https://md.mova.elamur.ai/free/en/corpora/school/everyday/) / [Thinking it through: the science behin…](https://md.mova.elamur.ai/free/en/corpora/school/everyday/40-home-safety-reasoning/) / 26

# Thinking it through: the science behind home safety, sentence 26

<!-- .ven lang=en -->
Carbon monoxide is a poisonous gas with no colour and no smell, so homes with fuel-burning heaters or boilers need a carbon monoxide alarm.

<!-- .vintro -->
**Who acts:** Carbon monoxide, homes · **What happens:** be, burn, need · **To what, where:** poisonous gas, monoxide alarm

<!-- .vabout -->
This is a sentence of the lesson «Thinking it through: the science behind home safety» 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 (Carbon monoxide, homes), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:040-home-safety-reasoning.lesson:26
# text = Carbon monoxide is a poisonous gas with no colour and no smell, so homes with fuel-burning heaters or boilers need a carbon monoxide alarm.
# source = school lesson (ours)
# course = everyday
# lesson = 040-home-safety-reasoning.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): R8-pos-agree ×1
1	Carbon	carbon	NOUN	NN	Number=Sing	2	compound	_	_
2	monoxide	monoxide	NOUN	NN	Number=Sing	6	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	poisonous	poisonous	ADJ	JJ	Degree=Pos	6	amod	_	_
6	gas	gas	NOUN	NN	Number=Sing	0	root	_	_
7	with	with	ADP	IN	_	9	case	_	_
8	no	no	DET	DT	PronType=Neg	9	det	_	_
9	colour	colour	NOUN	NN	Number=Sing	6	nmod	_	_
10	and	and	CCONJ	CC	_	12	cc	_	_
11	no	no	DET	DT	PronType=Neg	12	det	_	_
12	smell	smell	NOUN	NN	Number=Sing	9	conj	_	_
13	,	,	PUNCT	,	_	23	punct	_	_
14	so	so	ADV	RB	_	23	advmod	_	_
15	homes	home	NOUN	NNS	Number=Plur	23	nsubj	_	_
16	with	with	ADP	IN	_	20	case	_	_
17	fuel	fuel	NOUN	NN	Number=Sing	19	compound	_	_
18	-	-	PUNCT	HYPH	_	20	punct	_	Agree=R8-pos-agree|Haiku=20:punct|HaikuPos=PUNCT:,:_
19	burning	burn	VERB	VBG	VerbForm=Ger	20	amod	_	_
20	heaters	heater	NOUN	NNS	Number=Plur	15	nmod	_	_
21	or	or	CCONJ	CC	_	22	cc	_	_
22	boilers	boiler	NOUN	NNS	Number=Plur	20	conj	_	_
23	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	6	parataxis	_	_
24	a	a	DET	DT	Definite=Ind|PronType=Art	27	det	_	_
25	carbon	carbon	NOUN	NN	Number=Sing	26	compound	_	_
26	monoxide	monoxide	NOUN	NN	Number=Sing	27	compound	_	_
27	alarm	alarm	NOUN	NN	Number=Sing	23	obj	_	_
28	.	.	PUNCT	.	_	6	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | Carbon monoxide | a poisonous gas |  |  |  | with no colour and no smell | tree rules |
| 2 | **burn** | gerund |  |  |  |  |  |  | vn light\_emission-43.1 «NP V»: agent=Theme |
| 3 | **need** | present | homes with burning heaters or boilers | a monoxide alarm |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot alarm=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.

<!-- div src -->

**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:040-home-safety-reasoning.lesson:26`.

**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): R8-pos-agree ×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/).

<!-- /div -->

<!-- pn -->
- ← previous: [Thinking it through: the science behin…, 24](https://md.mova.elamur.ai/free/en/corpora/school/everyday/40-home-safety-reasoning/24/)
- next →: [Thinking it through: the science behin…, 27](https://md.mova.elamur.ai/free/en/corpora/school/everyday/40-home-safety-reasoning/27/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/everyday/40-home-safety-reasoning/)

