---
title: Identify the principal reason for which the constellations visible i… — Constellations and the night sky in wi… · tree and pragmatics
description: Identify the principal reason for which the constellations visible in the evening sky vary in the course of a year. Exam question 2 of lesson 20 «Constellations and the night sky in winter and spring» of the space course of Mova's primary school, with the dependency tree and pragmatics of the questi
---

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# Exam question 2 · Constellations and the night sky in winter and spring

<!-- .ven lang=en -->
Identify the principal reason for which the constellations visible in the evening sky vary in the course of a year.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you, constellations · **What happens:** identify, vary · **To what, where:** principal reason, course

<!-- .vabout -->
This is exam question 2 of lesson 20 «Constellations and the night sky in winter and spring» of the space 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/space/20-constellations-and-the-night-sky-in-winter-and-spring/#e2).

## The question {#question}

```conllu
# sent_id = question:space:20-constellations-and-the-night-sky-in-winter-and-spring:e2:1
# text = Identify the principal reason for which the constellations visible in the evening sky vary in the course of a year.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	14	obl	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	constellations	constellation	NOUN	NNS	Number=Plur	14	nsubj	_	_
9	visible	visible	ADJ	JJ	Degree=Pos	8	amod	_	_
10	in	in	ADP	IN	_	13	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
12	evening	evening	NOUN	NN	Number=Sing	13	compound	_	_
13	sky	sky	NOUN	NN	Number=Sing	9	obl	_	_
14	vary	vary	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	acl:relcl	_	_
15	in	in	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	course	course	NOUN	NN	Number=Sing	14	obl	_	_
18	of	of	ADP	IN	_	20	case	_	_
19	a	a	DET	DT	Definite=Ind|PronType=Art	20	det	_	_
20	year	year	NOUN	NN	Number=Sing	17	nmod	_	SpaceAfter=No
21	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal reason |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **vary** | present | the constellations |  |  | the course of a year |  | for the principal reason | vn caused\_calibratable\_cos-45.6.2-1 «NP V ADV-Middle»: agent=Patient |

<!-- .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 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
The orbital motion of the Earth about the Sun

```conllu
# sent_id = question:space:20-constellations-and-the-night-sky-in-winter-and-spring:e2:o1:1
# text = The orbital motion of the Earth about the Sun
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	orbital	orbital	ADJ	JJ	Degree=Pos	3	amod	_	_
3	motion	motion	NOUN	NN	Number=Sing	0	root	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	Earth	Earth	PROPN	NNP	Number=Sing	3	nmod	_	_
7	about	about	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	Sun	Sun	PROPN	NNP	Number=Sing	3	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **motion** |  | the Earth |  |  |  |  | about the Sun | nom motion «communication intransitive»: of=agent about=obl |

### Option 2 {#o2}

<!-- .ven lang=en -->
The motion of the stars about the Earth

```conllu
# sent_id = question:space:20-constellations-and-the-night-sky-in-winter-and-spring:e2:o2:1
# text = The motion of the stars about the Earth
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	motion	motion	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	stars	star	NOUN	NNS	Number=Plur	2	nmod	_	_
6	about	about	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	Earth	Earth	PROPN	NNP	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **motion** |  | the stars about the Earth |  |  |  |  |  | nom motion «communication intransitive»: of=agent |

### Option 3 {#o3}

<!-- .ven lang=en -->
The extinction of the stars during summer

```conllu
# sent_id = question:space:20-constellations-and-the-night-sky-in-winter-and-spring:e2:o3:1
# text = The extinction of the stars during summer
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	extinction	extinction	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	stars	star	NOUN	NNS	Number=Plur	2	nmod	_	_
6	during	during	ADP	IN	_	7	case	_	_
7	summer	summer	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **extinguish** |  |  | the stars during summer |  |  |  |  | nom extinction «state transitive»: of=patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The obscuration of the stars by seasonal clouds

```conllu
# sent_id = question:space:20-constellations-and-the-night-sky-in-winter-and-spring:e2:o4:1
# text = The obscuration of the stars by seasonal clouds
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	obscuration	obscuration	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	stars	star	NOUN	NNS	Number=Plur	2	nmod	_	_
6	by	by	ADP	IN	_	8	case	_	_
7	seasonal	seasonal	ADJ	JJ	Degree=Pos	8	amod	_	_
8	clouds	cloud	NOUN	NNS	Number=Plur	2	nmod	_	_
```

<!-- .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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- ← previous: [Constellations and the night sky in wi…, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/space/20-constellations-and-the-night-sky-in-winter-and-spring/e1/)
- next →: [Constellations and the night sky in wi…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/space/20-constellations-and-the-night-sky-in-winter-and-spring/e3/)
- ↑ back to [Constellations and the night sky in winter and spring](https://md.mova.elamur.ai/free/en/corpora/questions/space/20-constellations-and-the-night-sky-in-winter-and-spring/)