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Test 3 · ★ · Balance: the centre of gravity

A dad and a toddler want to balance on a seesaw. What works?

Mova's choice: option 1 · The right answer: option 4 · wrong ✗ · Who acts: dad · What happens: want, balance, work · To what, where: seesaw

This is test 3 · ★ of lesson 8 «Balance: the centre of gravity» of the physics 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.

The question

Sentence 1: A dad and a toddler want to balance on a seesaw.

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	A	a	DET	Definite=Ind PronType=Art	2 dad	det
2	dad	dad	NOUN	Number=Sing	6 want	nsubj
3	and	and	CCONJ	_	5 toddler	cc
4	a	a	DET	Definite=Ind PronType=Art	5 toddler	det
5	toddler	toddler	NOUN	Number=Sing	2 dad	conj
6	want	want	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	root	root
7	to	to	PART	_	8 balance	mark
8	balance	balance	VERB	VerbForm=Inf	6 want	xcomp
9	on	on	ADP	_	11 seesaw	case
10	a	a	DET	Definite=Ind PronType=Art	11 seesaw	det
11	seesaw	seesaw	NOUN	Number=Sing	8 balance	obl
12	.	.	PUNCT	_	6 want	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	want	present	a dad and a toddler						vn want-32.1-1-1 «NP V NP S_INF»: agent=Pivot clause=Theme
2	balance not said to happen	to-infinitive	a dad and a toddler not said here			a seesaw			vn spatial_configuration-47.6-1 «NP V PP.location»: agent=Theme on seesaw=Location

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.

Sentence 2: What works?

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	What	what	PRON	PronType=Int	2 works	nsubj
2	works	work	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	?	?	PUNCT	_	2 works	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	work	present							vn employment-95.3 «NP V»: agent=Agent

The options

Option 1 · ← Mova's choice

The toddler sits in the middle and the dad sits at the end

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	The	the	DET	Definite=Def PronType=Art	2 toddler	det
2	toddler	toddler	NOUN	Number=Sing	3 sits	nsubj
3	sits	sit	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
4	in	in	ADP	_	6 middle	case
5	the	the	DET	Definite=Def PronType=Art	6 middle	det
6	middle	middle	NOUN	Number=Sing	3 sits	obl
7	and	and	CCONJ	_	10 sits	cc
8	the	the	DET	Definite=Def PronType=Art	9 dad	det
9	dad	dad	NOUN	Number=Sing	10 sits	nsubj
10	sits	sit	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	3 sits	conj
11	at	at	ADP	_	13 end	case
12	the	the	DET	Definite=Def PronType=Art	13 end	det
13	end	end	NOUN	Number=Sing	10 sits	obl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	sit	present	the toddler			the middle			vn assuming_position-50 «NP V PP.location»: agent=Agent in middle=Location
2	sit	present	the dad				at the end		vn assuming_position-50 «NP V PP.location»: agent=Agent at end=Location

Option 2

It cannot be done at all

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	It	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	5 done	nsubj:pass
2	can	can	AUX	VerbForm=Fin	5 done	aux
3	not	not	PART	Polarity=Neg	5 done	advmod
4	be	be	AUX	VerbForm=Inf	5 done	aux:pass
5	done	do	VERB	Tense=Past VerbForm=Part Voice=Pass	root	root
6	at	at	ADP	_	7 all	case
7	all	all	DET	PronType=Tot	5 done	obl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	not do	can · passive		It		all			vn act-114-1 «NP V NP»: subject=Eventuality

Option 3

The dad sits at the very end

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	The	the	DET	Definite=Def PronType=Art	2 dad	det
2	dad	dad	NOUN	Number=Sing	3 sits	nsubj
3	sits	sit	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
4	at	at	ADP	_	7 end	case
5	the	the	DET	Definite=Def PronType=Art	7 end	det
6	very	very	ADV	_	7 end	advmod
7	end	end	NOUN	Number=Sing	3 sits	obl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	sit	present	the dad				at the end		vn assuming_position-50 «NP V PP.location»: agent=Agent at end=Location

Option 4 · ✓ the right answer

The dad sits very close to the middle

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	The	the	DET	Definite=Def PronType=Art	2 dad	det
2	dad	dad	NOUN	Number=Sing	3 sits	nsubj
3	sits	sit	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
4	very	very	ADV	_	5 close	advmod
5	close	close	ADJ	Degree=Pos	3 sits	xcomp
6	to	to	ADP	_	8 middle	case
7	the	the	DET	Definite=Def PronType=Art	8 middle	det
8	middle	middle	NOUN	Number=Sing	5 close	obl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	sit	present	the dad					close property	vn assuming_position-50 «NP V»: agent=Agent

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/physics/8-balance-the-centre-of-gravity/t3/