Exam question 1 · Rust: iron's slow fire

Identify the two substances whose simultaneous presence is required for the rusting of iron.

Mova's choice: option 1 · The right answer: option 2 · wrong ✗ · Who acts: you · What happens: identify, require · To what, where: two substances, simultaneous presence

This is exam question 1 of lesson 13 «Rust: iron's slow fire» of the chemistry course of Mova's primary school, asked in stiff, formal language. 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.

The question

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Identify	identify	VERB	Mood=Imp VerbForm=Fin	root	root
2	the	the	DET	Definite=Def PronType=Art	4 substances	det
3	two	two	NUM	NumForm=Word NumType=Card	4 substances	nummod
4	substances	substance	NOUN	Number=Plur	1 Identify	obj
5	whose	whose	PRON	Poss=Yes PronType=Rel	7 presence	nmod:poss
6	simultaneous	simultaneous	ADJ	Degree=Pos	7 presence	amod
7	presence	presence	NOUN	Number=Sing	9 required	nsubj:pass
8	is	be	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	9 required	aux:pass
9	required	require	VERB	Tense=Past VerbForm=Part Voice=Pass	4 substances	acl:relcl
10	for	for	ADP	_	12 rusting	case
11	the	the	DET	Definite=Def PronType=Art	12 rusting	det
12	rusting	rusting	NOUN	Number=Sing	9 required	obl
13	of	of	ADP	_	14 iron	case
14	iron	iron	NOUN	Number=Sing	12 rusting	nmod
15	.	.	PUNCT	_	1 Identify	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	identify	imperative	you not said here	the two substances					vn characterize-29.2-1-1 «NP V NP S_ING»: agent=Agent substance=Theme
2	require	present · passive		simultaneous presence				for the rusting of iron	vn require-103-1 «NP V NP»: subject=Precondition

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.

The options

Option 1 · ← Mova's choice

Carbon and sunlight

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Carbon	carbon	NOUN	Number=Sing	root	root
2	and	and	CCONJ	_	3 sunlight	cc
3	sunlight	sunlight	NOUN	Number=Sing	1 Carbon	conj

The frames reader finds no event or fact in this sentence.

Option 2 · ✓ the right answer

Oxygen and water

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Oxygen	oxygen	NOUN	Number=Sing	root	root
2	and	and	CCONJ	_	3 water	cc
3	water	water	NOUN	Number=Sing	1 Oxygen	conj

The frames reader finds no event or fact in this sentence.

Option 3

Oxygen and sea salt

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Oxygen	oxygen	NOUN	Number=Sing	root	root
2	and	and	CCONJ	_	4 salt	cc
3	sea	sea	NOUN	Number=Sing	4 salt	compound
4	salt	salt	NOUN	Number=Sing	1 Oxygen	conj

The frames reader finds no event or fact in this sentence.

Option 4

Nitrogen and water

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Nitrogen	Nitrogen	PROPN	Number=Sing	root	root
2	and	and	CCONJ	_	3 water	cc
3	water	water	NOUN	Number=Sing	1 Nitrogen	conj

The frames reader finds no event or fact in this sentence.

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.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/13-rust-irons-slow-fire/e1/