---
title: Phobos is spiralling slowly inwards, and in about 50 million years i… — Mars · tree and pragmatics
description: Phobos is spiralling slowly inwards, and in about 50 million years it will crash into Mars or break into a ring. Who acts: Phobos, impact. A sentence of the lesson «Mars» of the space course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Mars, sentence 16

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Phobos is spiralling slowly inwards, and in about 50 million years it will crash into Mars or break into a ring.

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**Who acts:** Phobos, impact · **What happens:** spiral, crash, break · **To what, where:** Mars, ring

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This is a sentence of the lesson «Mars» of the space 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 (Phobos, impact), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:space:008-mars.lesson:16
# text = Phobos is spiralling slowly inwards, and in about 50 million years it will crash into Mars or break into a ring.
# source = school lesson (ours)
# course = space
# lesson = 008-mars.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	Phobos	Phobos	PROPN	NNP	Number=Sing	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux	_	_
3	spiralling	spiral	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
4	slowly	slowly	ADV	RB	_	3	advmod	_	_
5	inwards	inwards	ADV	RB	_	3	advmod	_	_
6	,	,	PUNCT	,	_	15	punct	_	_
7	and	and	CCONJ	CC	_	15	cc	_	_
8	in	in	ADP	IN	_	12	case	_	_
9	about	about	ADV	RB	_	11	advmod	_	_
10	50	50	NUM	CD	NumForm=Digit|NumType=Card	11	compound	_	_
11	million	million	NUM	CD	NumForm=Word|NumType=Card	12	nummod	_	_
12	years	year	NOUN	NNS	Number=Plur	15	obl	_	_
13	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	15	nsubj	_	_
14	will	will	AUX	MD	VerbForm=Fin	15	aux	_	_
15	crash	crash	VERB	VB	VerbForm=Inf	3	conj	_	_
16	into	into	ADP	IN	_	17	case	_	_
17	Mars	Mars	PROPN	NNP	Number=Sing	15	obl	_	_
18	or	or	CCONJ	CC	_	19	cc	_	_
19	break	break	VERB	VB	VerbForm=Inf	15	conj	_	_
20	into	into	ADP	IN	_	22	case	_	_
21	a	a	DET	DT	Definite=Ind|PronType=Art	22	det	_	_
22	ring	ring	NOUN	NN	Number=Sing	19	obl	_	_
23	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **spiral** | present · progressive | Phobos |  |  |  |  | inwards, slowly *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 2 | **crash** | future | impact |  |  |  | year | into Mars *result* | vn break-45.1 «NP V PP.result»: agent=Patient into mars=Result |
| 3 | **break** | infinitive | impact *not said here* |  |  |  |  | into a ring *result* | vn break-45.1 «NP V PP.result»: agent=Patient into ring=Result |

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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.

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**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:space:008-mars.lesson:16`.

**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/).

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- ← previous: [Mars, 15](https://md.mova.elamur.ai/free/en/corpora/school/space/8-mars/15/)
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- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/space/8-mars/)