Wolves in Yellowstone, beavers in Britain and bringing nature back, sentence 7

A trophic cascade is a change at the top of a food chain that ripples down: wolves eat elk, elk eat trees, and trees shade streams and feed beavers.

Who acts: trophic cascade, food chain, wolves, elk, trees · What happens: be, ripple down, eat, shade, feed · To what, where: change, top, elk, trees, streams, beavers

This is a sentence of the lesson «Wolves in Yellowstone, beavers in Britain and bringing nature back» of the biology course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (trophic cascade, food chain, wolves, elk), what happens, when and where, as Mova's frames read it from the tree.

The tree

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	A	a	DET	Definite=Ind PronType=Art	3 cascade	det
2	trophic	trophic	ADJ	Degree=Pos	3 cascade	amod
3	cascade	cascade	NOUN	Number=Sing	6 change	nsubj
4	is	be	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	6 change	cop
5	a	a	DET	Definite=Ind PronType=Art	6 change	det
6	change	change	NOUN	Number=Sing	root	root
7	at	at	ADP	_	9 top	case
8	the	the	DET	Definite=Def PronType=Art	9 top	det
9	top	top	NOUN	Number=Sing	6 change	nmod
10	of	of	ADP	_	13 chain	case
11	a	a	DET	Definite=Ind PronType=Art	13 chain	det
12	food	food	NOUN	Number=Sing	13 chain	compound
13	chain	chain	NOUN	Number=Sing	9 top	nmod
14	that	that	PRON	PronType=Rel	15 ripples	nsubj
15	ripples	ripple	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	13 chain	acl:relcl
16	down	down	ADV	_	15 ripples	advmod
17	:	:	PUNCT	_	19 eat	punct
18	wolves	wolf	NOUN	Number=Plur	19 eat	nsubj
19	eat	eat	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	6 change	parataxis
20	elk	elk	NOUN	Number=Plur	19 eat	obj
21	,	,	PUNCT	_	23 eat	punct
22	elk	elk	NOUN	Number=Plur	23 eat	nsubj
23	eat	eat	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	19 eat	conj
24	trees	tree	NOUN	Number=Plur	23 eat	obj
25	,	,	PUNCT	_	28 shade	punct
26	and	and	CCONJ	_	28 shade	cc
27	trees	tree	NOUN	Number=Plur	28 shade	nsubj
28	shade	shade	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	19 eat	conj
29	streams	stream	NOUN	Number=Plur	28 shade	obj
30	and	and	CCONJ	_	31 feed	cc
31	feed	feed	VERB	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	28 shade	conj
32	beavers	beaver	NOUN	Number=Plur	31 feed	obj
33	.	.	PUNCT	_	6 change	punct

Pragmatics

form: statement
act: assert
voice: narrator
polarity: none
teacher: kept the draft

#	verb	tense, mood	who	what, whom	to whom	where	other	roles by
1	is a	present	a trophic cascade	a change		the top of a food chain		tree rules
2	ripple down	present	a food chain				down property	vn entity_specific_modes_being-47.2 «NP V»: agent=Theme
3	eat	present	wolves	elk				vn eat-39.1-1 «NP V NP»: agent=Agent elk=Patient
4	eat	present	elk	trees				vn eat-39.1-1 «NP V NP»: agent=Agent tree=Patient
5	shade	present	trees	streams				vn defend-72.3 «NP V NP»: agent=Agent stream=Beneficiary
6	feed	present	trees not said here		beavers			vn feeding-39.7 «NP V NP»: agent=Agent beaver=Recipient

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.

Licence: CC BY-SA 4.0, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, mova-school-agreed-en.conllu) is part. The lessons were written for Mova's primary school. Sentence school:biology:283-wolves-in-yellowstone-beavers-in-britain-and-bringing-nature-back.lesson:7.

The tree: Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R3-conj-first ×1. The frames are read from the tree by Mova's frames reader (prag) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the release 0.4.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/biology/283-wolves-in-yellowstone-beavers-in-britain-and-bringing-nature-back/7/