---
title: Given that a navigator's clock indicates two o'clock in the afternoo… — Pendulums, Greenwich and railway time,… · tree and pragmatics
description: Given that a navigator's clock indicates two o'clock in the afternoon, London time, at the moment of local noon, and that the Earth rotates fifteen degrees per hour, ascertain the position of the ship. Exam question 2 of lesson 123 «Pendulums, Greenwich and railway time, atomic clocks and phones» of
---

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# Exam question 2 · Pendulums, Greenwich and railway time, atomic clocks and p…

<!-- .ven lang=en -->
Given that a navigator's clock indicates two o'clock in the afternoon, London time, at the moment of local noon, and that the Earth rotates fifteen degrees per hour, ascertain the position of the ship.

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 3 · wrong ✗ · **Who acts:** clock, Earth, you · **What happens:** give, indicate, rotate, ascertain · **To what, where:** two o'clock, fifteen degrees, position

<!-- .vabout -->
This is exam question 2 of lesson 123 «Pendulums, Greenwich and railway time, atomic clocks and phones» of the world course of Mova's primary school, asked in stiff, formal language. 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/world/123-pendulums-greenwich-atomic-clocks/#e2).

## The question {#question}

```conllu
# sent_id = question:world:123-pendulums-greenwich-atomic-clocks:e2:1
# text = Given that a navigator's clock indicates two o'clock in the afternoon, London time, at the moment of local noon, and that the Earth rotates fifteen degrees per hour, ascertain the position of the ship.
1	Given	give	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	mark	_	_
2	that	that	SCONJ	IN	_	7	mark	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	navigator	navigator	NOUN	NN	Number=Sing	6	nmod:poss	_	SpaceAfter=No
5	's	's	PART	POS	_	4	case	_	_
6	clock	clock	NOUN	NN	Number=Sing	7	nsubj	_	_
7	indicates	indicate	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	34	advcl	_	_
8	two	two	NUM	CD	NumForm=Word|NumType=Card	9	nummod	_	_
9	o'clock	o'clock	NOUN	NN	Number=Sing	7	obj	_	_
10	in	in	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	afternoon	afternoon	NOUN	NN	Number=Sing	9	nmod	_	SpaceAfter=No
13	,	,	PUNCT	,	_	15	punct	_	_
14	London	London	PROPN	NNP	Number=Sing	15	compound	_	_
15	time	time	NOUN	NN	Number=Sing	9	conj	_	SpaceAfter=No
16	,	,	PUNCT	,	_	19	punct	_	_
17	at	at	ADP	IN	_	19	case	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
19	moment	moment	NOUN	NN	Number=Sing	7	obl	_	_
20	of	of	ADP	IN	_	22	case	_	_
21	local	local	ADJ	JJ	Degree=Pos	22	amod	_	_
22	noon	noon	NOUN	NN	Number=Sing	19	nmod	_	SpaceAfter=No
23	,	,	PUNCT	,	_	34	punct	_	_
24	and	and	CCONJ	CC	_	34	cc	_	_
25	that	that	SCONJ	IN	_	28	mark	_	_
26	the	the	DET	DT	Definite=Def|PronType=Art	27	det	_	_
27	Earth	Earth	PROPN	NNP	Number=Sing	28	nsubj	_	_
28	rotates	rotate	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	34	advcl	_	_
29	fifteen	fifteen	NUM	CD	NumForm=Word|NumType=Card	30	nummod	_	_
30	degrees	degree	NOUN	NNS	Number=Plur	28	obj	_	_
31	per	per	ADP	IN	_	32	case	_	_
32	hour	hour	NOUN	NN	Number=Sing	30	nmod	_	SpaceAfter=No
33	,	,	PUNCT	,	_	28	punct	_	_
34	ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
35	the	the	DET	DT	Definite=Def|PronType=Art	36	det	_	_
36	position	position	NOUN	NN	Number=Sing	34	obj	_	_
37	of	of	ADP	IN	_	39	case	_	_
38	the	the	DET	DT	Definite=Def|PronType=Art	39	det	_	_
39	ship	ship	NOUN	NN	Number=Sing	36	nmod	_	SpaceAfter=No
40	.	.	PUNCT	.	_	34	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **give** | participle |  |  |  |  |  |  | vn break\_down-45.8 «NP V»: agent=Patient |
| 2 | **indicate** | present | a navigator's clock | two o'clock and London time |  |  | moment | in the afternoon | vn indicate-78-1 «NP V NP»: agent=Pivot o'clock=Topic |
| 3 | **rotate** | present | the Earth | fifteen degrees |  |  | per hour |  | vn modes\_of\_being\_with\_motion-47.3 «PP.location V NP»: agent=Location degree=Theme |
| 4 | **ascertain** | imperative | you *not said here* | the position of the ship |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent position=Topic |

<!-- .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.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Thirty degrees east of Greenwich

```conllu
# sent_id = question:world:123-pendulums-greenwich-atomic-clocks:e2:o1:1
# text = Thirty degrees east of Greenwich
1	Thirty	thirty	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	degrees	degree	NOUN	NNS	Number=Plur	3	obl:unmarked	_	_
3	east	east	ADV	RB	_	0	root	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	Greenwich	Greenwich	PROPN	NNP	Number=Sing	3	obl	_	_
```

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

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
Two degrees west of Greenwich

```conllu
# sent_id = question:world:123-pendulums-greenwich-atomic-clocks:e2:o2:1
# text = Two degrees west of Greenwich
1	Two	two	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	degrees	degree	NOUN	NNS	Number=Plur	3	obl:unmarked	_	_
3	west	west	ADV	RB	_	0	root	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	Greenwich	Greenwich	PROPN	NNP	Number=Sing	3	obl	_	_
```

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

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
Thirty degrees west of Greenwich

```conllu
# sent_id = question:world:123-pendulums-greenwich-atomic-clocks:e2:o3:1
# text = Thirty degrees west of Greenwich
1	Thirty	thirty	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	degrees	degree	NOUN	NNS	Number=Plur	3	obl:unmarked	_	_
3	west	west	ADV	RB	_	0	root	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	Greenwich	Greenwich	PROPN	NNP	Number=Sing	3	obl	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
Fifteen degrees west of Greenwich

```conllu
# sent_id = question:world:123-pendulums-greenwich-atomic-clocks:e2:o4:1
# text = Fifteen degrees west of Greenwich
1	Fifteen	fifteen	NUM	CD	NumForm=Word|NumType=Card	2	nummod	_	_
2	degrees	degree	NOUN	NNS	Number=Plur	3	obl:unmarked	_	_
3	west	west	ADV	RB	_	0	root	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	Greenwich	Greenwich	PROPN	NNP	Number=Sing	3	obl	_	_
```

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

<!-- div src -->

**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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- next →: [Pendulums, Greenwich and railway time,…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/world/123-pendulums-greenwich-atomic-clocks/e3/)
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