---
title: Bright city lights can pull night-flying birds off course until they… — Migration: the great journeys · tree and pragmatics
description: Bright city lights can pull night-flying birds off course until they tire out or hit glass, and some cities dim their lights in migration season to save them. Who acts: city lights, birds, cities. A sentence of the lesson «Migration: the great journeys» of the biology course of Mova's primary school
---

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# Migration: the great journeys, sentence 16

<!-- .ven lang=en -->
Bright city lights can pull night-flying birds off course until they tire out or hit glass, and some cities dim their lights in migration season to save them.

<!-- .vintro -->
**Who acts:** city lights, birds, cities · **What happens:** pull, fly, tire out, hit, dim, save · **To what, where:** flying birds, glass, lights, birds

<!-- .vabout -->
This is a sentence of the lesson «Migration: the great journeys» 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 (city lights, birds, cities), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:054-migration-the-great-journeys.lesson:16
# text = Bright city lights can pull night-flying birds off course until they tire out or hit glass, and some cities dim their lights in migration season to save them.
# source = school lesson (ours)
# course = biology
# lesson = 054-migration-the-great-journeys.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 ×1, R7-rel-agree ×1, R8-pos-agree ×1
1	Bright	bright	ADJ	JJ	Degree=Pos	2	amod	_	_
2	city	city	NOUN	NN	Number=Sing	3	compound	_	_
3	lights	light	NOUN	NNS	Number=Plur	5	nsubj	_	_
4	can	can	AUX	MD	VerbForm=Fin	5	aux	_	_
5	pull	pull	VERB	VB	VerbForm=Inf	0	root	_	_
6	night	night	NOUN	NN	Number=Sing	8	compound	_	_
7	-	-	PUNCT	HYPH	_	8	punct	_	_
8	flying	fly	VERB	VBG	VerbForm=Ger	9	amod	_	_
9	birds	bird	NOUN	NNS	Number=Plur	5	obj	_	_
10	off	off	ADV	RB	_	11	advmod	_	_
11	course	course	NOUN	NN	Number=Sing	5	obl:unmarked	_	_
12	until	until	SCONJ	IN	_	14	mark	_	_
13	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	14	nsubj	_	_
14	tire	tire	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	advcl	_	_
15	out	out	ADP	RP	_	14	compound:prt	_	Agree=R7-rel-agree|Haiku=14:advmod|HaikuPos=ADV:RB:_
16	or	or	CCONJ	CC	_	17	cc	_	_
17	hit	hit	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	14	conj	_	Agree=R8-pos-agree|Haiku=14:conj|HaikuPos=VERB:VB:VerbForm=Inf
18	glass	glass	NOUN	NN	Number=Sing	17	obj	_	_
19	,	,	PUNCT	,	_	23	punct	_	_
20	and	and	CCONJ	CC	_	23	cc	_	_
21	some	some	DET	DT	PronType=Ind	22	det	_	_
22	cities	city	NOUN	NNS	Number=Plur	23	nsubj	_	_
23	dim	dim	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	conj	_	_
24	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	25	nmod:poss	_	_
25	lights	light	NOUN	NNS	Number=Plur	23	obj	_	_
26	in	in	ADP	IN	_	28	case	_	_
27	migration	migration	NOUN	NN	Number=Sing	28	compound	_	_
28	season	season	NOUN	NN	Number=Sing	23	obl	_	Agree=R5-strong|Haiku=25:nmod
29	to	to	PART	TO	_	30	mark	_	_
30	save	save	VERB	VB	VerbForm=Inf	23	advcl	_	_
31	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	30	obj	_	_
32	.	.	PUNCT	.	_	5	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 | **pull** | can | city lights | flying birds |  |  |  | course *obl:unmarked* | vn push-12-1 «NP V NP ADJP-Result»: agent=Agent bird=Result |
| 2 | **fly** | gerund |  |  |  |  |  |  | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |
| 3 | **tire out** | present | birds *= bird* |  |  |  |  |  | vn amuse-31.1 «NP V ADV-Middle»: agent=Experiencer |
| 4 | **hit** | present | birds *= bird* *not said here* | glass |  |  |  |  | vn contiguous\_location-47.8-1 «NP V NP»: agent=Theme glass=Co-Theme |
| 5 | **dim** | present | some cities | birds's lights |  |  | season |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent light=Patient |
| 6 | **save** | to-infinitive | some cities *not said here* | birds *= bird* |  |  |  |  | vn get-13.5.1-1 «NP V NP»: agent=Agent they=Theme |
| 7 | **light** |  | birds *= bird* |  |  |  |  |  | nom light «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:054-migration-the-great-journeys.lesson:16`.

**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 ×1, R7-rel-agree ×1, 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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