Exam question 3 · Mixtures and how to separate them

Identify the process by which pure water may be obtained from salt water.

Mova's choice: option 1 · The right answer: option 3 · wrong ✗ · Who acts: you, process · What happens: identify, obtain · To what, where: process, pure water, salt water

This is exam question 3 of lesson 19 «Mixtures and how to separate them» of the world 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	3 process	det
3	process	process	NOUN	Number=Sing	1 Identify	obj
4	by	by	ADP	_	5 which	case
5	which	which	PRON	PronType=Rel	10 obtained	obl
6	pure	pure	ADJ	Degree=Pos	7 water	amod
7	water	water	NOUN	Number=Sing	10 obtained	nsubj:pass
8	may	may	AUX	VerbForm=Fin	10 obtained	aux
9	be	be	AUX	VerbForm=Inf	10 obtained	aux:pass
10	obtained	obtain	VERB	Tense=Past VerbForm=Part Voice=Pass	3 process	acl:relcl
11	from	from	ADP	_	13 water	case
12	salt	salt	NOUN	Number=Sing	13 water	compound
13	water	water	NOUN	Number=Sing	10 obtained	obl
14	.	.	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 process					vn characterize-29.2-1-1 «NP V NP S_ING»: agent=Agent process=Theme
2	obtain	may · passive	the process	pure water		salt water			vn obtain-13.5.2-1 «NP V NP PP.source»: agent=Agent subject=Theme from water=Source

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

Sieving through a fine mesh

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Sieving	sieve	VERB	Tense=Pres VerbForm=Part	root	root
2	through	through	ADP	_	5 mesh	case
3	a	a	DET	Definite=Ind PronType=Art	5 mesh	det
4	fine	fine	ADJ	Degree=Pos	5 mesh	amod
5	mesh	mesh	NOUN	Number=Sing	1 Sieving	obl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	sieve	gerund				a fine mesh			vn disassemble-23.3 «NP V ADV-Middle»: agent=Patient

Option 2

Separation by means of a magnet

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Separation	separation	NOUN	Number=Sing	3 means	nsubj
2	by	by	ADP	_	1 Separation	fixed
3	means	mean	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
4	of	of	ADP	_	6 magnet	case
5	a	a	DET	Definite=Ind PronType=Art	6 magnet	det
6	magnet	magnet	NOUN	Number=Sing	3 means	obl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	mean	present	Separation					of a magnet	vn intend-61.2-1 «NP V S»: agent=Agent

Option 3 · ✓ the right answer

Distillation, the vapour being collected and condensed

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Distillation	distillation	NOUN	Number=Sing	6 collected	nsubj:pass
2	,	,	PUNCT	_	1 Distillation	punct
3	the	the	DET	Definite=Def PronType=Art	4 vapour	det
4	vapour	vapour	NOUN	Number=Sing	6 collected	nsubj:pass
5	being	be	AUX	Tense=Pres VerbForm=Part	6 collected	aux:pass
6	collected	collect	VERB	Tense=Past VerbForm=Part Voice=Pass	root	root
7	and	and	CCONJ	_	8 condensed	cc
8	condensed	condense	VERB	Tense=Past VerbForm=Part Voice=Pass	6 collected	conj

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	collect	gerund · passive		Distillation					vn obtain-13.5.2 «NP V NP»: subject=Theme
2	condense	participle							vn other_cos-45.4 «NP.patient V»: agent=Patient

Option 4

Filtration through fine paper

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Filtration	filtration	NOUN	Number=Sing	root	root
2	through	through	ADP	_	4 paper	case
3	fine	fine	ADJ	Degree=Pos	4 paper	amod
4	paper	paper	NOUN	Number=Sing	1 Filtration	nmod

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.

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