---
title: A comet's tails always point away from the Sun, so when a comet is h… — Olympiad: planet puzzles ★★★ · tree and pragmatics
description: A comet's tails always point away from the Sun, so when a comet is heading back out, its tails go in front of it. Who acts: tails, comet. A sentence of the lesson «Olympiad: planet puzzles ★★★» of the space course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Olympiad: planet puzzles ★★★, sentence 16

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A comet's tails always point away from the Sun, so when a comet is heading back out, its tails go in front of it.

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**Who acts:** tails, comet · **What happens:** point, head, go · **To what, where:** front

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This is a sentence of the lesson «Olympiad: planet puzzles ★★★» 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 (tails, comet), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:space:031-olympiad-planet-puzzles.lesson:16
# text = A comet's tails always point away from the Sun, so when a comet is heading back out, its tails go in front of it.
# source = school lesson (ours)
# course = space
# lesson = 031-olympiad-planet-puzzles.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	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	comet	comet	NOUN	NN	Number=Sing	4	nmod:poss	_	_
3	's	's	PART	POS	_	2	case	_	_
4	tails	tail	NOUN	NNS	Number=Plur	6	nsubj	_	_
5	always	always	ADV	RB	_	6	advmod	_	_
6	point	point	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	away	away	ADV	RB	_	6	advmod	_	_
8	from	from	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	Sun	Sun	PROPN	NNP	Number=Sing	7	obl	_	_
11	,	,	PUNCT	,	_	23	punct	_	_
12	so	so	ADV	RB	_	23	advmod	_	_
13	when	when	ADV	WRB	PronType=Int	17	advmod	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	15	det	_	_
15	comet	comet	NOUN	NN	Number=Sing	17	nsubj	_	_
16	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	17	aux	_	_
17	heading	head	VERB	VBG	Tense=Pres|VerbForm=Part	23	advcl	_	_
18	back	back	ADV	RB	_	19	advmod	_	_
19	out	out	ADV	RB	_	17	advmod	_	_
20	,	,	PUNCT	,	_	17	punct	_	_
21	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	22	nmod:poss	_	_
22	tails	tail	NOUN	NNS	Number=Plur	23	nsubj	_	_
23	go	go	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	6	conj	_	_
24	in	in	ADP	IN	_	25	case	_	_
25	front	front	NOUN	NN	Number=Sing	23	obl	_	_
26	of	of	ADP	IN	_	27	case	_	_
27	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	25	nmod	_	_
28	.	.	PUNCT	.	_	6	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: changed form=decl

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **point** | present | a comet's tails |  |  |  |  | always, away *property* | vn wink-40.3.1 «NP V»: agent=Agent |
| 2 | **head** | present · progressive | a comet |  |  |  |  | out *property* | vn conduct-111.1 «NP V NP»: agent=Agent |
| 3 | **go** | present | comet's tails |  |  | front of comet |  |  | vn occur-48.3-2 «NP V PP»: agent=Theme in front=Location |

<!-- .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.

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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:031-olympiad-planet-puzzles.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: [Olympiad: planet puzzles ★★★, 15](https://md.mova.elamur.ai/free/en/corpora/school/space/31-olympiad-planet-puzzles/15/)
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- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/space/31-olympiad-planet-puzzles/)