---
title: Wolves were brought back to Yellowstone in 1995; elk numbers fell an… — Food chains: sun, plants, plant-eaters, meat-eat… · tree and pragmatics
description: Wolves were brought back to Yellowstone in 1995; elk numbers fell and in some places young willows and aspens grew back, though scientists still argue how big the wolves' effect really was. Who acts: elk numbers, young willows, scientists, effect. A sentence of the lesson «Food chains: sun, plants, 
---

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# Food chains: sun, plants, plant-eaters, meat-eaters, sentence 12

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Wolves were brought back to Yellowstone in 1995; elk numbers fell and in some places young willows and aspens grew back, though scientists still argue how big the wolves' effect really was.

<!-- .vintro -->
**Who acts:** elk numbers, young willows, scientists, effect, wolves · **What happens:** bring back, fell, grow back, argue, be, effect · **To what, where:** Wolves, 1995, places · **Speech:** someone speaks here

<!-- .vabout -->
This is a sentence of the lesson «Food chains: sun, plants, plant-eaters, meat-eaters» 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 (elk numbers, young willows, scientists, effect), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:046-food-chains.lesson:12
# text = Wolves were brought back to Yellowstone in 1995; elk numbers fell and in some places young willows and aspens grew back, though scientists still argue how big the wolves' effect really was.
# source = school lesson (ours)
# course = biology
# lesson = 046-food-chains.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×2, R7-rel-agree ×2, R8-pos-agree ×1
1	Wolves	wolf	NOUN	NNS	Number=Plur	3	nsubj:pass	_	_
2	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	3	aux:pass	_	_
3	brought	bring	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	back	back	ADV	RB	_	3	advmod	_	_
5	to	to	ADP	IN	_	6	case	_	_
6	Yellowstone	Yellowstone	PROPN	NNP	Number=Sing	4	obl	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	1995	1995	NUM	CD	NumForm=Digit|NumType=Card	3	obl	_	_
9	;	;	PUNCT	:	_	12	punct	_	_
10	elk	elk	NOUN	NN	Number=Sing	11	compound	_	Agree=R8-pos-agree|Haiku=11:compound|HaikuPos=NOUN:NNS:Number=Plur
11	numbers	number	NOUN	NNS	Number=Plur	12	nsubj	_	_
12	fell	fell	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	3	parataxis	_	Agree=R7-rel-agree|Haiku=3:conj
13	and	and	CCONJ	CC	_	21	cc	_	_
14	in	in	ADP	IN	_	16	case	_	_
15	some	some	DET	DT	PronType=Ind	16	det	_	_
16	places	place	NOUN	NNS	Number=Plur	21	obl	_	Agree=R7-rel-agree|Haiku=21:nsubj
17	young	young	ADJ	JJ	Degree=Pos	18	amod	_	_
18	willows	willow	NOUN	NNS	Number=Plur	21	nsubj	_	Agree=R5-strong|Haiku=16:conj
19	and	and	CCONJ	CC	_	20	cc	_	_
20	aspens	aspen	NOUN	NNS	Number=Plur	18	conj	_	Agree=R5-strong|Haiku=16:conj
21	grew	grow	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	12	conj	_	_
22	back	back	ADV	RB	_	21	advmod	_	_
23	,	,	PUNCT	,	_	27	punct	_	_
24	though	though	SCONJ	IN	_	27	mark	_	_
25	scientists	scientist	NOUN	NNS	Number=Plur	27	nsubj	_	_
26	still	still	ADV	RB	_	27	advmod	_	_
27	argue	argue	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	21	advcl	_	_
28	how	how	ADV	WRB	PronType=Int	29	advmod	_	_
29	big	big	ADJ	JJ	Degree=Pos	27	ccomp	_	_
30	the	the	DET	DT	Definite=Def|PronType=Art	31	det	_	_
31	wolves	wolf	NOUN	NNS	Number=Plur	33	nmod:poss	_	_
32	'	's	PART	POS	_	31	case	_	_
33	effect	effect	NOUN	NN	Number=Sing	29	nsubj	_	_
34	really	really	ADV	RB	_	29	advmod	_	_
35	was	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	29	cop	_	_
36	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **bring back** | past · passive |  | Wolves |  | 1995 |  |  | vn bring-11.3-1 «NP V NP together»: subject=Theme |
| 2 | **fell** | past | elk numbers |  |  |  |  |  | tree rules |
| 3 | **grow back** | past | young willows and aspens |  |  | some places |  |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme in place=Location |
| 4 | **argue** *speech: disagree* | present | scientists |  |  |  | still |  | vn correspond-36.1-1 «NP V»: agent=Agent |
| 5 | **is** | past | the wolves's effect |  |  |  |  | big *property* | tree rules |
| 6 | **effect** |  | the wolves |  |  |  |  |  | nom effect «phenomenon transitive»: poss=agent |

<!-- .note -->
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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/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:046-food-chains.lesson:12`.

**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): R5-strong ×2, R7-rel-agree ×2, R8-pos-agree ×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](https://md.mova.elamur.ai/free/en/releases/0.4/).

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