---
title: Which is true about a supermassive black hole? — Black holes · tree and pragmatics
description: Which is true about a supermassive black hole? Test 9 · ★★ of lesson 25 «Black holes» of the space course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 9 · ★★ · Black holes

<!-- .ven lang=en -->
Which is true about a supermassive black hole?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **What happens:** be

<!-- .vabout -->
This is test 9 · ★★ of lesson 25 «Black holes» of the space 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/space/25-black-holes/#t9).

## The question {#question}

```conllu
# sent_id = question:space:25-black-holes:t9:1
# text = Which is true about a supermassive black hole?
1	Which	which	PRON	WDT	PronType=Rel	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	true	true	ADJ	JJ	Degree=Pos	0	root	_	_
4	about	about	ADP	IN	_	8	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
6	supermassive	supermassive	ADJ	JJ	Degree=Pos	8	amod	_	_
7	black	black	ADJ	JJ	Degree=Pos	8	amod	_	_
8	hole	hole	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
9	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present |  |  |  |  |  | about a supermassive black hole; true *property* | tree rules |

<!-- .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 {#o1}

<!-- .ven lang=en -->
It is no heavier than a planet

```conllu
# sent_id = question:space:25-black-holes:t9:o1:1
# text = It is no heavier than a planet
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	no	no	ADV	RB	_	4	advmod	_	_
4	heavier	heavy	ADJ	JJR	Degree=Cmp	0	root	_	_
5	than	than	ADP	IN	_	7	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	planet	planet	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **is** | present | It |  |  |  |  | than a planet; heavy *property* | tree rules |

### Option 2 {#o2}

<!-- .ven lang=en -->
It only forms in empty space

```conllu
# sent_id = question:space:25-black-holes:t9:o2:1
# text = It only forms in empty space
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	only	only	ADV	RB	_	3	advmod	_	_
3	forms	form	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	IN	_	6	case	_	_
5	empty	empty	ADJ	JJ	Degree=Pos	6	amod	_	_
6	space	space	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **form** | present | It |  |  | empty space |  |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme in space=Location |

### Option 3 {#o3}

<!-- .ven lang=en -->
It sits deep at the centre of the Earth, inside the core

```conllu
# sent_id = question:space:25-black-holes:t9:o3:1
# text = It sits deep at the centre of the Earth, inside the core
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	sits	sit	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	deep	deep	ADJ	JJ	Degree=Pos	2	xcomp	_	_
4	at	at	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	centre	centre	NOUN	NN	Number=Sing	2	obl	_	_
7	of	of	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	Earth	Earth	PROPN	NNP	Number=Sing	6	nmod	_	SpaceAfter=No
10	,	,	PUNCT	,	_	13	punct	_	_
11	inside	inside	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	core	core	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **sit** | present | It |  |  | the centre of the Earth |  | inside the core; deep *property* | vn assuming\_position-50 «NP V PP.location»: agent=Agent at centre=Location |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
It can be billions of times the Sun's mass

```conllu
# sent_id = question:space:25-black-holes:t9:o4:1
# text = It can be billions of times the Sun's mass
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
2	can	can	AUX	MD	VerbForm=Fin	4	aux	_	_
3	be	be	AUX	VB	VerbForm=Inf	4	cop	_	_
4	billions	billion	NOUN	NNS	Number=Plur	0	root	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	times	time	NOUN	NNS	Number=Plur	4	nmod	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	Sun	Sun	PROPN	NNP	Number=Sing	10	nmod:poss	_	SpaceAfter=No
9	's	's	PART	POS	_	8	case	_	_
10	mass	mass	NOUN	NN	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | can | It | billions |  |  | time |  | tree rules |

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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.

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- ← previous: [Black holes, test 8](https://md.mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/t8/)
- next →: [Black holes, test 10](https://md.mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/t10/)
- ↑ back to [Black holes](https://md.mova.elamur.ai/free/en/corpora/questions/space/25-black-holes/)