---
title: "why'd they cover the fence in zinc, it's gonna corrode anyway innit… — Rust: iron's slow fire · tree and pragmatics
description: "why'd they cover the fence in zinc, it's gonna corrode anyway innit". What's the point? Test 10 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 10 · Rust: iron's slow fire

<!-- .ven lang=en -->
"why'd they cover the fence in zinc, it's gonna corrode anyway innit". What's the point?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** they, fence, point · **What happens:** cover, be · **To what, where:** fence

<!-- .vabout -->
This is test 10 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/#t10).

## The question {#question}

<!-- .note -->
*Sentence 1:* "why'd they cover the fence in zinc, it's gonna corrode anyway innit".

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t10:1
# text = "why'd they cover the fence in zinc, it's gonna corrode anyway innit".
1	"	"	PUNCT	``	_	2	punct	_	SpaceAfter=No
2	why	why	ADV	WRB	PronType=Int	0	root	_	SpaceAfter=No
3	'd	'd	PUNCT	,	_	5	punct	_	_
4	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	5	nsubj	_	_
5	cover	cover	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	advcl:relcl	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	fence	fence	NOUN	NN	Number=Sing	5	obj	_	_
8	in	in	ADP	IN	_	9	case	_	_
9	zinc	zinc	NOUN	NN	Number=Sing	5	obl	_	SpaceAfter=No
10	,	,	PUNCT	,	_	14	punct	_	_
11	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	14	nsubj	_	SpaceAfter=No
12	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	cop	_	_
13	gonna	gonna	PART	TO	_	14	mark	_	_
14	corrode	corrode	VERB	VB	VerbForm=Inf	5	conj	_	_
15	anyway	anyway	ADV	RB	_	16	advmod	_	_
16	innit	innit	NOUN	NN	Number=Sing	14	obj	_	SpaceAfter=No
17	"	"	PUNCT	''	_	16	punct	_	SpaceAfter=No
18	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cover** *in a quote* | present | they | the fence |  |  |  | in zinc | vn fill-9.8-1 «NP V NP PP.theme»: agent=Agent fence=Destination in zinc=Theme |
| 2 | **is** *in a quote* | present | fence |  |  |  |  | corrode *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:* What's the point?

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t10:2
# text = What's the point?
1	What	what	PRON	WP	PronType=Int	0	root	_	SpaceAfter=No
2	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	cop	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	point	point	NOUN	NN	Number=Sing	1	nsubj	_	SpaceAfter=No
5	?	?	PUNCT	.	_	1	punct	_	_
```

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

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Zinc makes the fence stronger in high wind

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t10:o1:1
# text = Zinc makes the fence stronger in high wind
1	Zinc	zinc	NOUN	NN	Number=Sing	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	fence	fence	NOUN	NN	Number=Sing	2	obj	_	_
5	stronger	strong	ADJ	JJR	Degree=Cmp	2	xcomp	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	high	high	ADJ	JJ	Degree=Pos	8	amod	_	_
8	wind	wind	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Zinc | the fence |  | high wind |  | strong *property* | vn build-26.1-1 «NP.material V NP»: agent=Material fence=Product |

### Option 2 {#o2}

<!-- .ven lang=en -->
Zinc is cheaper than painting it

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t10:o2:1
# text = Zinc is cheaper than painting it
1	Zinc	zinc	NOUN	NN	Number=Sing	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	cheaper	cheap	ADJ	JJR	Degree=Cmp	0	root	_	_
4	than	than	SCONJ	IN	_	5	mark	_	_
5	painting	paint	VERB	VBG	Tense=Pres|VerbForm=Part	3	advcl	_	_
6	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	5	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Zinc |  |  |  |  | cheap *property* | tree rules |
| 2 | **paint** | gerund | Zinc *not said here* | Zinc |  |  |  |  | vn image\_impression-25.1 «NP V NP.destination»: agent=Agent it=Destination |

### Option 3 {#o3}

<!-- .ven lang=en -->
Zinc keeps the snails off the fence

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t10:o3:1
# text = Zinc keeps the snails off the fence
1	Zinc	zinc	NOUN	NN	Number=Sing	2	nsubj	_	_
2	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	snails	snail	NOUN	NNS	Number=Plur	2	obj	_	_
5	off	off	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	fence	fence	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | Zinc | the snails |  |  |  | off the fence | vn keep-15.2 «NP V NP»: agent=Agent snail=Theme |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
The zinc corrodes first and saves the steel

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t10:o4:1
# text = The zinc corrodes first and saves the steel
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	zinc	zinc	NOUN	NN	Number=Sing	3	nsubj	_	_
3	corrodes	corrode	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	first	first	ADV	RB	NumForm=Word|NumType=Ord	3	advmod	_	_
5	and	and	CCONJ	CC	_	6	cc	_	_
6	saves	save	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	steel	steel	NOUN	NN	Number=Sing	6	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **corrode** | present | the zinc |  |  |  |  | first *property* | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |
| 2 | **save** | present | the zinc *not said here* | the steel |  |  |  |  | vn get-13.5.1-1 «NP V NP»: agent=Agent steel=Theme |

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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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