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Test 5 · ★★★ · Balance in a food web

A pond food web has algae, water fleas, small fish and a pike. Someone adds many more pike. What happens first?

Mova's choice: option 1 · The right answer: option 3 · wrong ✗ · Who acts: pond food web, Someone · What happens: have, add, happen · To what, where: algae, many more pike

This is test 5 · ★★★ of lesson 30 «Balance in a food web» of the world 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 pond food web has algae, water fleas, small fish and a pike.

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	A	a	DET	Definite=Ind PronType=Art	4 web	det
2	pond	pond	NOUN	Number=Sing	4 web	compound
3	food	food	NOUN	Number=Sing	4 web	compound
4	web	web	NOUN	Number=Sing	5 has	nsubj
5	has	have	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
6	algae	alga	NOUN	Number=Plur	5 has	obj
7	,	,	PUNCT	_	9 fleas	punct
8	water	water	NOUN	Number=Sing	9 fleas	compound
9	fleas	flea	NOUN	Number=Plur	6 algae	conj
10	,	,	PUNCT	_	12 fish	punct
11	small	small	ADJ	Degree=Pos	12 fish	amod
12	fish	fish	NOUN	Number=Sing	6 algae	conj
13	and	and	CCONJ	_	15 pike	cc
14	a	a	DET	Definite=Ind PronType=Art	15 pike	det
15	pike	pike	NOUN	Number=Sing	12 fish	conj
16	.	.	PUNCT	_	5 has	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	have	present	a pond food web	algae and water fleas and small fish and a pike					vn birth-28.2-1 «NP V NP»: agent=Agent alga=Patient

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: Someone adds many more pike.

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Someone	someone	PRON	Number=Sing PronType=Ind	2 adds	nsubj
2	adds	add	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	many	many	ADJ	Degree=Pos	5 pike	amod
4	more	more	ADJ	Degree=Cmp	5 pike	amod
5	pike	pike	NOUN	Number=Sing	2 adds	obj
6	.	.	PUNCT	_	2 adds	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	add speech: assert	present	Someone	many more pike					vn mix-22.1-2 «NP V NP»: agent=Agent pike=Patient

Sentence 3: What happens first?

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	What	what	PRON	PronType=Int	2 happens	nsubj
2	happens	happen	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	first	first	ADV	NumForm=Word NumType=Ord	2 happens	advmod
4	?	?	PUNCT	_	2 happens	punct

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	happen	present						first property	vn occur-48.3-1 «NP V»: agent=Theme

The options

Option 1 · ← Mova's choice

Water fleas become fewer

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Water	water	NOUN	Number=Sing	2 fleas	compound
2	fleas	flea	NOUN	Number=Plur	3 become	nsubj
3	become	become	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	root	root
4	fewer	few	ADJ	Degree=Cmp	3 become	xcomp

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	become	present	Water fleas					few property	vn become-109.1-1-1 «NP V PP.attribute»: agent=Patient

Option 2

The pike all become thin at once

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	The	the	DET	Definite=Def PronType=Art	2 pike	det
2	pike	pike	NOUN	Number=Sing	4 become	nsubj
3	all	all	ADV	_	4 become	advmod
4	become	become	VERB	Mood=Ind Tense=Pres VerbForm=Fin	root	root
5	thin	thin	ADJ	Degree=Pos	4 become	xcomp
6	at	at	ADP	_	7 once	case
7	once	once	ADV	NumForm=Word NumType=Mult	5 thin	obl

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	become	present	the pike					all, thin property	vn become-109.1-1-1 «NP V PP.attribute»: agent=Patient

Option 3 · ✓ the right answer

Small fish become fewer

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Small	small	ADJ	Degree=Pos	2 fish	amod
2	fish	fish	NOUN	Number=Plur	3 become	nsubj
3	become	become	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	root	root
4	fewer	few	ADJ	Degree=Cmp	3 become	xcomp

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	become	present	Small fish					few property	vn become-109.1-1-1 «NP V PP.attribute»: agent=Patient

Option 4

Algae become fewer

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Algae	alga	NOUN	Number=Plur	2 become	nsubj
2	become	become	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	root	root
3	fewer	few	ADJ	Degree=Cmp	2 become	xcomp

#	verb	tense, mood	who	what, whom	to whom	where	when	other	roles by
1	become	present	Algae					few property	vn become-109.1-1-1 «NP V PP.attribute»: agent=Patient

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/world/30-balance-in-food-webs/t5/