---
title: A lacy snowflake drifts down slowly, but a hailstone is a solid ball… — Parachutes, skydivers and falling safely · tree and pragmatics
description: A lacy snowflake drifts down slowly, but a hailstone is a solid ball of ice and pelts down; big hailstones can dent cars. Who acts: lacy snowflake, hailstone, big hailstones. A sentence of the lesson «Parachutes, skydivers and falling safely» of the physics course of Mova's primary school with its d
---

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# Parachutes, skydivers and falling safely, sentence 17

<!-- .ven lang=en -->
A lacy snowflake drifts down slowly, but a hailstone is a solid ball of ice and pelts down; big hailstones can dent cars.

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**Who acts:** lacy snowflake, hailstone, big hailstones · **What happens:** drift down, be, pelt down, dent · **To what, where:** solid ball, cars

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This is a sentence of the lesson «Parachutes, skydivers and falling safely» of the physics 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 (lacy snowflake, hailstone, big hailstones), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:003-parachutes-and-falling-safely.lesson:17
# text = A lacy snowflake drifts down slowly, but a hailstone is a solid ball of ice and pelts down; big hailstones can dent cars.
# source = school lesson (ours)
# course = physics
# lesson = 003-parachutes-and-falling-safely.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): R2-punct-next ×1, R5-strong ×1, R6-punct-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	lacy	lacy	ADJ	JJ	Degree=Pos	3	amod	_	_
3	snowflake	snowflake	NOUN	NN	Number=Sing	4	nsubj	_	_
4	drifts	drift	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	down	down	ADV	RB	_	4	advmod	_	Agree=R5-strong|Haiku=6:advmod
6	slowly	slowly	ADV	RB	_	4	advmod	_	_
7	,	,	PUNCT	,	_	14	punct	_	Agree=R2-punct-next|Haiku=4:punct
8	but	but	CCONJ	CC	_	14	cc	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
10	hailstone	hailstone	NOUN	NN	Number=Sing	14	nsubj	_	_
11	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	cop	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
13	solid	solid	ADJ	JJ	Degree=Pos	14	amod	_	_
14	ball	ball	NOUN	NN	Number=Sing	4	conj	_	_
15	of	of	ADP	IN	_	16	case	_	_
16	ice	ice	NOUN	NN	Number=Sing	14	nmod	_	_
17	and	and	CCONJ	CC	_	18	cc	_	_
18	pelts	pelt	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	conj	_	_
19	down	down	ADV	RB	_	18	advmod	_	_
20	;	;	PUNCT	,	_	4	punct	_	_
21	big	big	ADJ	JJ	Degree=Pos	22	amod	_	_
22	hailstones	hailstone	NOUN	NNS	Number=Plur	24	nsubj	_	_
23	can	can	AUX	MD	VerbForm=Fin	24	aux	_	_
24	dent	dent	VERB	VB	VerbForm=Inf	4	parataxis	_	_
25	cars	car	NOUN	NNS	Number=Plur	24	obj	_	_
26	.	.	PUNCT	.	_	4	punct	_	Agree=R6-punct-agree|Haiku=24:punct
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **drift down** | present | a lacy snowflake |  |  |  |  | down, slowly *property* | vn run-51.3.2-2 «NP V»: agent=Theme |
| 2 | **is a** | present | a hailstone | a solid ball |  |  |  | of ice | tree rules |
| 3 | **pelt down** | present | a hailstone *not said here* |  |  |  |  | down *property* | vn weather-57 «It V PP.theme» |
| 4 | **dent** | can | big hailstones | cars |  |  |  |  | vn carve-21.2-1 «NP V NP»: agent=Agent car=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.

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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:physics:003-parachutes-and-falling-safely.lesson:17`.

**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): R2-punct-next ×1, R5-strong ×1, R6-punct-agree ×1. **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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