---
title: Leo stepped on a shiny, clean nail in a muddy field. "it's not rusty… — Rust: iron's slow fire · tree and pragmatics
description: Leo stepped on a shiny, clean nail in a muddy field. "it's not rusty, so no worries". Right? Test 7 of lesson 13 «Rust: iron's slow fire» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Test 7 · Rust: iron's slow fire

<!-- .ven lang=en -->
Leo stepped on a shiny, clean nail in a muddy field. "it's not rusty, so no worries". Right?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** Leo, field · **What happens:** step, not be · **To what, where:** shiny clean nail · **Speech:** someone speaks here

<!-- .vabout -->
This is test 7 of lesson 13 «Rust: iron's slow fire» of the chemistry 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/chemistry/13-rust-irons-slow-fire/#t7).

## The question {#question}

<!-- .note -->
*Sentence 1:* Leo stepped on a shiny, clean nail in a muddy field. "it's not rusty, so no worries".

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t7:1
# text = Leo stepped on a shiny, clean nail in a muddy field. "it's not rusty, so no worries".
1	Leo	Leo	PROPN	NNP	Number=Sing	2	nsubj	_	_
2	stepped	step	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
3	on	on	ADP	IN	_	8	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
5	shiny	shiny	ADJ	JJ	Degree=Pos	8	amod	_	SpaceAfter=No
6	,	,	PUNCT	,	_	5	punct	_	_
7	clean	clean	ADJ	JJ	Degree=Pos	8	amod	_	_
8	nail	nail	NOUN	NN	Number=Sing	2	obl	_	_
9	in	in	ADP	IN	_	12	case	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
11	muddy	muddy	ADJ	JJ	Degree=Pos	12	amod	_	_
12	field	field	NOUN	NN	Number=Sing	2	obl	_	SpaceAfter=No
13	.	.	PUNCT	.	_	2	punct	_	_
14	"	"	PUNCT	''	_	18	punct	_	SpaceAfter=No
15	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	18	nsubj	_	SpaceAfter=No
16	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	18	cop	_	_
17	not	not	PART	RB	Polarity=Neg	18	advmod	_	_
18	rusty	rusty	ADJ	JJ	Degree=Pos	2	parataxis	_	SpaceAfter=No
19	,	,	PUNCT	,	_	22	punct	_	_
20	so	so	ADV	RB	_	22	advmod	_	_
21	no	no	DET	DT	PronType=Neg	22	det	_	_
22	worries	worry	NOUN	NNS	Number=Plur	18	parataxis	_	SpaceAfter=No
23	"	"	PUNCT	''	_	22	punct	_	SpaceAfter=No
24	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **step** | past | Leo |  |  | a shiny clean nail |  | in a muddy field | tree rules |
| 2 | **not** **is** *in a quote* | present | field |  |  |  |  | rusty *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.

<!-- .note -->
*Sentence 2:* Right?

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t7:2
# text = Right?
1	Right	right	INTJ	UH	_	0	root	_	SpaceAfter=No
2	?	?	PUNCT	.	_	1	punct	_	_
```

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

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
No, the germ comes from the dirt, so get it checked

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t7:o1:1
# text = No, the germ comes from the dirt, so get it checked
1	No	no	INTJ	UH	Polarity=Neg	5	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	germ	germ	NOUN	NN	Number=Sing	5	nsubj	_	_
5	comes	come	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	from	from	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	dirt	dirt	NOUN	NN	Number=Sing	5	obl	_	SpaceAfter=No
9	,	,	PUNCT	,	_	11	punct	_	_
10	so	so	ADV	RB	_	11	advmod	_	_
11	get	get	VERB	VB	Mood=Imp|VerbForm=Fin	5	conj	_	_
12	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	obj	_	_
13	checked	check	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	11	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **come** | present | the germ |  |  | the dirt |  |  | vn escape-51.1-1 «NP V PP.initial\_location»: agent=Theme from dirt=Initial\_Location |
| 2 | **get** | infinitive | the germ *not said here* | germ |  |  |  |  | tree rules |
| 3 | **check** | participle | germ *not said here* |  |  |  |  |  | vn assessment-34.1 «NP V NP»: agent=Agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
Yes, only rusty nails are any risk

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t7:o2:1
# text = Yes, only rusty nails are any risk
1	Yes	yes	INTJ	UH	Polarity=Pos	8	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	only	only	ADV	RB	_	5	advmod	_	_
4	rusty	rusty	ADJ	JJ	Degree=Pos	5	amod	_	_
5	nails	nail	NOUN	NNS	Number=Plur	8	nsubj	_	_
6	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	cop	_	_
7	any	any	DET	DT	PronType=Ind	8	det	_	_
8	risk	risk	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | rusty nails | any risk |  |  |  |  | tree rules |

### Option 3 {#o3}

<!-- .ven lang=en -->
Yes, shiny metal kills any germs as soon as they touch it

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t7:o3:1
# text = Yes, shiny metal kills any germs as soon as they touch it
1	Yes	yes	INTJ	UH	Polarity=Pos	5	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	shiny	shiny	ADJ	JJ	Degree=Pos	4	amod	_	_
4	metal	metal	NOUN	NN	Number=Sing	5	nsubj	_	_
5	kills	kill	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	any	any	DET	DT	PronType=Ind	7	det	_	_
7	germs	germ	NOUN	NNS	Number=Plur	5	obj	_	_
8	as	as	ADV	RB	_	9	advmod	_	_
9	soon	soon	ADV	RB	Degree=Pos	5	advmod	_	_
10	as	as	SCONJ	IN	_	12	mark	_	_
11	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	12	nsubj	_	_
12	touch	touch	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	advcl	_	_
13	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	12	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **kill** | present | shiny metal | any germs |  |  |  | soon *property* | vn remove-10.1 «NP V NP»: agent=Agent germ=Theme |
| 2 | **touch** | present | germs *= germ* | metal |  |  |  |  | vn contiguous\_location-47.8-1 «NP V NP»: agent=Theme it=Co-Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
No, shiny nails are more dangerous than rusty ones

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t7:o4:1
# text = No, shiny nails are more dangerous than rusty ones
1	No	no	INTJ	UH	Polarity=Neg	7	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	7	punct	_	_
3	shiny	shiny	ADJ	JJ	Degree=Pos	4	amod	_	_
4	nails	nail	NOUN	NNS	Number=Plur	7	nsubj	_	_
5	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
6	more	more	ADV	RBR	Degree=Cmp	7	advmod	_	_
7	dangerous	dangerous	ADJ	JJ	Degree=Pos	0	root	_	_
8	than	than	ADP	IN	_	10	case	_	_
9	rusty	rusty	ADJ	JJ	Degree=Pos	10	amod	_	_
10	ones	one	NOUN	NNS	Number=Plur	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | shiny nails |  |  |  |  | than rusty ones; dangerous *property* | tree rules |

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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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