---
title: Natural gas has no smell, so a strong-smelling chemical is added to… — Smells that warn · tree and pragmatics
description: Natural gas has no smell, so a strong-smelling chemical is added to make leaks noticeable. Who acts: Natural gas. A sentence of the lesson «Smells that warn» of the everyday course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Smells that warn, sentence 7

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Natural gas has no smell, so a strong-smelling chemical is added to make leaks noticeable.

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**Who acts:** Natural gas · **What happens:** have, smell, add, make · **To what, where:** smell, strong smelling chemical, leaks

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This is a sentence of the lesson «Smells that warn» 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 (Natural gas), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:013-smells-that-warn.lesson:7
# text = Natural gas has no smell, so a strong-smelling chemical is added to make leaks noticeable.
# source = school lesson (ours)
# course = everyday
# lesson = 013-smells-that-warn.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): R5-strong ×1, R7-rel-agree ×1
1	Natural	natural	ADJ	JJ	Degree=Pos	2	amod	_	_
2	gas	gas	NOUN	NN	Number=Sing	3	nsubj	_	_
3	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	no	no	DET	DT	PronType=Neg	5	det	_	_
5	smell	smell	NOUN	NN	Number=Sing	3	obj	_	_
6	,	,	PUNCT	,	_	14	punct	_	_
7	so	so	ADV	RB	_	14	advmod	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	Agree=R5-strong|Haiku=14:det
9	strong	strong	ADJ	JJ	Degree=Pos	12	amod	_	_
10	-	-	PUNCT	HYPH	_	9	punct	_	_
11	smelling	smell	VERB	VBG	Tense=Pres|VerbForm=Part	12	amod	_	_
12	chemical	chemical	NOUN	NN	Number=Sing	14	nsubj:pass	_	_
13	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	aux:pass	_	_
14	added	add	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	parataxis	_	Agree=R7-rel-agree|Haiku=3:conj
15	to	to	PART	TO	_	16	mark	_	_
16	make	make	VERB	VB	VerbForm=Inf	14	advcl	_	_
17	leaks	leak	NOUN	NNS	Number=Plur	16	obj	_	_
18	noticeable	noticeable	ADJ	JJ	Degree=Pos	16	xcomp	_	_
19	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Natural gas | no smell |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent smell=Patient |
| 2 | **smell** | gerund |  |  |  |  |  |  | vn smell\_emission-43.3 «NP V»: agent=Theme |
| 3 | **add** *speech: assert* | present · passive |  | a strong smelling chemical |  |  |  |  | vn mix-22.1-2 «NP V NP»: subject=Patient |
| 4 | **make** | to-infinitive |  | leaks |  |  |  | noticeable *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset leak=Product |

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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:013-smells-that-warn.lesson:7`.

**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): R5-strong ×1, R7-rel-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/).

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