---
title: An owl and an osprey both catch slippery prey. What do their feet sh… — Owls of the world: barn owls, eagle ow… · tree and pragmatics
description: An owl and an osprey both catch slippery prey. What do their feet share? Test 11 of lesson 301 «Owls of the world: barn owls, eagle owls, elf owls and burrowing owls» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's ch
---

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# Test 11 · Owls of the world: barn owls, eagle owls, elf owls and bur…

<!-- .ven lang=en -->
An owl and an osprey both catch slippery prey. What do their feet share?

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 2 · wrong ✗ · **Who acts:** owl, feet · **What happens:** catch, share · **To what, where:** slippery prey

<!-- .vabout -->
This is test 11 of lesson 301 «Owls of the world: barn owls, eagle owls, elf owls and burrowing owls» of the biology course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/biology/301-owls-of-the-world-barn-owls-eagle-owls-elf-owls-and-burrowing-owls/#t11).

## The question {#question}

<!-- .note -->
*Sentence 1:* An owl and an osprey both catch slippery prey.

```conllu
# sent_id = question:biology:301-owls-of-the-world-barn-owls-eagle-owls-elf-owls-and-burrowing-owls:t11:1
# text = An owl and an osprey both catch slippery prey.
1	An	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	owl	owl	NOUN	NN	Number=Sing	7	nsubj	_	_
3	and	and	CCONJ	CC	_	5	cc	_	_
4	an	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	osprey	osprey	NOUN	NN	Number=Sing	2	conj	_	_
6	both	both	DET	DT	PronType=Tot	7	nsubj	_	_
7	catch	catch	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	slippery	slippery	ADJ	JJ	Degree=Pos	9	amod	_	_
9	prey	prey	NOUN	NN	Number=Sing	7	obj	_	SpaceAfter=No
10	.	.	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **catch** | present | a owl and a osprey | slippery prey |  |  |  |  | vn get-13.5.1 «NP V NP»: agent=Agent prey=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.

<!-- .note -->
*Sentence 2:* What do their feet share?

```conllu
# sent_id = question:biology:301-owls-of-the-world-barn-owls-eagle-owls-elf-owls-and-burrowing-owls:t11:2
# text = What do their feet share?
1	What	what	PRON	WP	PronType=Int	5	obj	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	aux	_	_
3	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	4	nmod:poss	_	_
4	feet	foot	NOUN	NNS	Number=Plur	5	nsubj	_	_
5	share	share	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	SpaceAfter=No
6	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **share** | present · do-support | owl's feet |  |  |  |  |  | tree rules |

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Webbed feet for swimming

```conllu
# sent_id = question:biology:301-owls-of-the-world-barn-owls-eagle-owls-elf-owls-and-burrowing-owls:t11:o1:1
# text = Webbed feet for swimming
1	Webbed	web	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
2	feet	foot	NOUN	NNS	Number=Plur	1	obl:unmarked	_	_
3	for	for	ADP	IN	_	4	case	_	_
4	swimming	swimming	NOUN	NN	Number=Sing	1	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **web** | participle |  | feet |  |  |  | for swimming | tree rules |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
An outer toe that can swing to the back

```conllu
# sent_id = question:biology:301-owls-of-the-world-barn-owls-eagle-owls-elf-owls-and-burrowing-owls:t11:o2:1
# text = An outer toe that can swing to the back
1	An	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	outer	outer	ADJ	JJ	Degree=Pos	3	amod	_	_
3	toe	toe	NOUN	NN	Number=Sing	0	root	_	_
4	that	that	PRON	WDT	PronType=Rel	6	nsubj	_	_
5	can	can	AUX	MD	VerbForm=Fin	6	aux	_	_
6	swing	swing	VERB	VB	VerbForm=Inf	3	acl:relcl	_	_
7	to	to	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	back	back	NOUN	NN	Number=Sing	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **swing** | can | a outer toe |  |  | the back |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme to back=Trajectory |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
Little suckers on every toe, like an octopus

```conllu
# sent_id = question:biology:301-owls-of-the-world-barn-owls-eagle-owls-elf-owls-and-burrowing-owls:t11:o3:1
# text = Little suckers on every toe, like an octopus
1	Little	little	ADJ	JJ	Degree=Pos	2	amod	_	_
2	suckers	sucker	NOUN	NNS	Number=Plur	0	root	_	_
3	on	on	ADP	IN	_	5	case	_	_
4	every	every	DET	DT	PronType=Tot	5	det	_	_
5	toe	toe	NOUN	NN	Number=Sing	2	nmod	_	SpaceAfter=No
6	,	,	PUNCT	,	_	9	punct	_	_
7	like	like	ADP	IN	_	9	case	_	_
8	an	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	octopus	octopus	NOUN	NN	Number=Sing	2	conj	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
Five toes on each foot

```conllu
# sent_id = question:biology:301-owls-of-the-world-barn-owls-eagle-owls-elf-owls-and-burrowing-owls:t11:o4:1
# text = Five toes on each foot
1	Five	five	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	toes	toe	NOUN	NNS	Number=Plur	0	root	_	_
3	on	on	ADP	IN	_	5	case	_	_
4	each	each	DET	DT	PronType=Tot	5	det	_	_
5	foot	foot	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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