Test 9 · ★★ · Pulleys, gears and big machines

What's the clever trick that lets one motor run a whole escalator?

Mova's choice: option 2 · The right answer: option 2 · right ✓ · Who acts: clever trick, one motor · What happens: be, let, run · To what, where: clever trick, one motor, whole escalator

This is test 9 · ★★ of lesson 35 «Pulleys, gears and big machines» 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

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	What	what	PRON	PronType=Int	5 trick	nsubj
2	's	be	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	5 trick	cop
3	the	the	DET	Definite=Def PronType=Art	5 trick	det
4	clever	clever	ADJ	Degree=Pos	5 trick	amod
5	trick	trick	NOUN	Number=Sing	root	root
6	that	that	PRON	PronType=Rel	7 lets	nsubj
7	lets	let	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	5 trick	acl:relcl
8	one	one	NUM	NumForm=Word NumType=Card	9 motor	nummod
9	motor	motor	NOUN	Number=Sing	7 lets	obj
10	run	run	VERB	VerbForm=Inf	7 lets	xcomp
11	a	a	DET	Definite=Ind PronType=Art	13 escalator	det
12	whole	whole	ADJ	Degree=Pos	13 escalator	amod
13	escalator	escalator	NOUN	Number=Sing	10 run	obj
14	?	?	PUNCT	_	5 trick	punct

#	verb	tense, mood	who	what, whom	roles by
1	is a	present		the clever trick	tree rules
2	let	present	the clever trick	one motor	tree rules
3	run	infinitive	one motor not said here	a whole escalator	vn run-51.3.2-2-1 «NP V NP»: agent=Theme escalator=Trajectory

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

Magnets lift each step

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Magnets	magnet	NOUN	Number=Plur	2 lift	nsubj
2	lift	lift	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	root	root
3	each	each	DET	PronType=Tot	4 step	det
4	step	step	NOUN	Number=Sing	2 lift	obj

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	lift	present	Magnets	each step					vn put_direction-9.4 «NP V NP»: agent=Agent step=Theme

Option 2 · ← Mova's choice · ✓ the right answer

A long loop of steps is pulled round by a motor and gears

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	A	a	DET	Definite=Ind PronType=Art	3 loop	det
2	long	long	ADJ	Degree=Pos	3 loop	amod
3	loop	loop	NOUN	Number=Sing	7 pulled	nsubj:pass
4	of	of	ADP	_	5 steps	case
5	steps	step	NOUN	Number=Plur	3 loop	nmod
6	is	be	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	7 pulled	aux:pass
7	pulled	pull	VERB	Tense=Past VerbForm=Part Voice=Pass	root	root
8	round	round	ADV	_	7 pulled	advmod
9	by	by	ADP	_	11 motor	case
10	a	a	DET	Definite=Ind PronType=Art	11 motor	det
11	motor	motor	NOUN	Number=Sing	7 pulled	obl:agent
12	and	and	CCONJ	_	13 gears	cc
13	gears	gear	NOUN	Number=Plur	11 motor	conj

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	pull round	present · passive	a motor and gears	a long loop of steps				round property	vn push-12-1 «NP V NP»: agent=Agent subject=Theme

Option 3

Each step has its own small engine

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Each	each	DET	PronType=Tot	2 step	det
2	step	step	NOUN	Number=Sing	3 has	nsubj
3	has	have	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
4	its	its	PRON	Case=Gen Gender=Neut Number=Sing Person=3 Poss=Yes PronType=Prs	7 engine	nmod:poss
5	own	own	ADJ	Degree=Pos	7 engine	amod
6	small	small	ADJ	Degree=Pos	7 engine	amod
7	engine	engine	NOUN	Number=Sing	3 has	obj

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	have	present	each step	step's own small engine					vn birth-28.2-1 «NP V NP»: agent=Agent engine=Patient

Option 4

People's weight pushes the steps up

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	People	people	NOUN	Number=Plur	3 weight	nmod:poss
2	's	's	PART	_	1 People	case
3	weight	weight	NOUN	Number=Sing	4 pushes	nsubj
4	pushes	push	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
5	the	the	DET	Definite=Def PronType=Art	6 steps	det
6	steps	step	NOUN	Number=Plur	4 pushes	obj
7	up	up	ADP	_	4 pushes	compound:prt

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	push up	present	People's weight	the steps					vn carry-11.4-1-1 «NP V NP»: agent=Agent step=Theme

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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