---
title: Frigatebirds can fly for weeks without landing; scientists found the… — How animals sleep: half-asleep dolphins, standin… · tree and pragmatics
description: Frigatebirds can fly for weeks without landing; scientists found they slept less than an hour a day while flying, mostly in seconds-long naps, but about twelve hours a day on land. Who acts: Frigatebirds, scientists. A sentence of the lesson «How animals sleep: half-asleep dolphins, standing horses,
---

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# How animals sleep: half-asleep dolphins, standing horses, short-sleeping giraffes and birds that nap in the air, sentence 9

<!-- .ven lang=en -->
Frigatebirds can fly for weeks without landing; scientists found they slept less than an hour a day while flying, mostly in seconds-long naps, but about twelve hours a day on land.

<!-- .vintro -->
**Who acts:** Frigatebirds, scientists · **What happens:** fly, land, find, sleep · **Speech:** someone speaks here

<!-- .vabout -->
This is a sentence of the lesson «How animals sleep: half-asleep dolphins, standing horses, short-sleeping giraffes and birds that nap in the air» 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 (Frigatebirds, scientists), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:390-how-animals-sleep-half-asleep-dolphins-standing-horses-short-sleeping-giraffes-and-birds-that-nap-in-the-air.lesson:9
# text = Frigatebirds can fly for weeks without landing; scientists found they slept less than an hour a day while flying, mostly in seconds-long naps, but about twelve hours a day on land.
# source = school lesson (ours)
# course = biology
# lesson = 390-how-animals-sleep-half-asleep-dolphins-standing-horses-short-sleeping-giraffes-and-birds-that-nap-in-the-air.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
1	Frigatebirds	frigatebird	NOUN	NNS	Number=Plur	3	nsubj	_	_
2	can	can	AUX	MD	VerbForm=Fin	3	aux	_	_
3	fly	fly	VERB	VB	VerbForm=Inf	0	root	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	weeks	week	NOUN	NNS	Number=Plur	3	obl	_	_
6	without	without	SCONJ	IN	_	7	mark	_	_
7	landing	land	VERB	VBG	Tense=Pres|VerbForm=Part	3	advcl	_	_
8	;	;	PUNCT	,	_	10	punct	_	_
9	scientists	scientist	NOUN	NNS	Number=Plur	10	nsubj	_	_
10	found	find	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	3	parataxis	_	_
11	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	12	nsubj	_	_
12	slept	sleep	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	10	ccomp	_	_
13	less	less	ADJ	JJR	Degree=Cmp	16	advmod	_	Agree=R7-rel-agree|Haiku=16:amod
14	than	than	ADP	IN	_	16	case	_	_
15	an	a	DET	DT	Definite=Ind|PronType=Art	16	det	_	_
16	hour	hour	NOUN	NN	Number=Sing	12	obl	_	_
17	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	_	_
18	day	day	NOUN	NN	Number=Sing	12	obl:unmarked	_	_
19	while	while	SCONJ	IN	_	20	mark	_	_
20	flying	fly	VERB	VBG	Tense=Pres|VerbForm=Part	12	advcl	_	_
21	,	,	PUNCT	,	_	24	punct	_	_
22	mostly	mostly	ADV	RB	_	24	advmod	_	_
23	in	in	ADP	IN	_	24	case	_	_
24	seconds	second	NOUN	NNS	Number=Plur	20	obl	_	_
25	-	-	PUNCT	HYPH	_	27	punct	_	_
26	long	long	ADJ	JJ	Degree=Pos	27	amod	_	_
27	naps	nap	NOUN	NNS	Number=Plur	24	conj	_	_
28	,	,	PUNCT	,	_	32	punct	_	_
29	but	but	CCONJ	CC	_	32	cc	_	_
30	about	about	ADV	RB	_	31	advmod	_	_
31	twelve	twelve	NUM	CD	NumForm=Word|NumType=Card	32	nummod	_	_
32	hours	hour	NOUN	NNS	Number=Plur	16	conj	_	_
33	a	a	DET	DT	Definite=Ind|PronType=Art	34	det	_	_
34	day	day	NOUN	NN	Number=Sing	32	nmod:unmarked	_	_
35	on	on	ADP	IN	_	36	case	_	_
36	land	land	NOUN	NN	Number=Sing	32	nmod	_	Agree=R5-strong|Haiku=34:nmod
37	.	.	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 | **fly** | can | Frigatebirds |  |  |  | week |  | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |
| 2 | **land** | gerund | Frigatebirds *not said here* |  |  |  |  |  | vn pocket-9.10-1 «NP V»: agent=Theme |
| 3 | **find** | past | scientists |  |  |  |  |  | vn declare-29.4-1-1 «NP V what S\_INF»: agent=Agent clause=Theme |
| 4 | **sleep** | past | scientists *= scientist* |  |  |  | day; hour |  | vn snooze-40.4-1 «NP V»: agent=Agent |
| 5 | **fly** | gerund | scientists *= scientist* *not said here* |  |  |  | second |  | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |

<!-- .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:390-how-animals-sleep-half-asleep-dolphins-standing-horses-short-sleeping-giraffes-and-birds-that-nap-in-the-air.lesson:9`.

**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. **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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