---
title: Many of a bird's bones are hollow, which makes it light for flying. — Birds: feathers, nests and flight · tree and pragmatics
description: Many of a bird's bones are hollow, which makes it light for flying. Who acts: Many. A sentence of the lesson «Birds: feathers, nests and flight» of the world course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/world/73-birds-feathers-nests-flight/9/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [World](https://md.mova.elamur.ai/free/en/corpora/school/world/) / [Birds: feathers, nests and flight](https://md.mova.elamur.ai/free/en/corpora/school/world/73-birds-feathers-nests-flight/) / 9

# Birds: feathers, nests and flight, sentence 9

<!-- .ven lang=en -->
Many of a bird's bones are hollow, which makes it light for flying.

<!-- .vintro -->
**Who acts:** Many · **What happens:** be, make, fly · **To what, where:** bird

<!-- .vabout -->
This is a sentence of the lesson «Birds: feathers, nests and flight» of the world 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 (Many), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:073-birds-feathers-nests-flight.lesson:9
# text = Many of a bird's bones are hollow, which makes it light for flying.
# source = school lesson (ours)
# course = world
# lesson = 073-birds-feathers-nests-flight.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): no change
1	Many	many	ADJ	JJ	Degree=Pos	8	nsubj	_	_
2	of	of	ADP	IN	_	6	case	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	bird	bird	NOUN	NN	Number=Sing	6	nmod:poss	_	_
5	's	's	PART	POS	_	4	case	_	_
6	bones	bone	NOUN	NNS	Number=Plur	1	nmod	_	_
7	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	cop	_	_
8	hollow	hollow	ADJ	JJ	Degree=Pos	0	root	_	_
9	,	,	PUNCT	,	_	11	punct	_	_
10	which	which	PRON	WDT	PronType=Rel	11	nsubj	_	_
11	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	parataxis	_	_
12	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	obj	_	_
13	light	light	ADJ	JJ	Degree=Pos	11	xcomp	_	_
14	for	for	SCONJ	IN	_	15	mark	_	_
15	flying	fly	VERB	VBG	Tense=Pres|VerbForm=Part	13	advcl	_	_
16	.	.	PUNCT	.	_	8	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 | **is** | present | Many of a bird's bones |  |  |  |  | hollow *property* | tree rules |
| 2 | **make** | present |  | bird |  |  |  | light *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset it=Product |
| 3 | **fly** | gerund |  |  |  |  |  |  | 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.

<!-- div src -->

**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:world:073-birds-feathers-nests-flight.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): no change. **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/).

<!-- /div -->

<!-- pn -->
- ← previous: [Birds: feathers, nests and flight, 8](https://md.mova.elamur.ai/free/en/corpora/school/world/73-birds-feathers-nests-flight/8/)
- next →: [Birds: feathers, nests and flight, 10](https://md.mova.elamur.ai/free/en/corpora/school/world/73-birds-feathers-nests-flight/10/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/world/73-birds-feathers-nests-flight/)