---
title: Heavy, pointed things dropped from a height really are dangerous, wh… — Parachutes, skydivers and falling safely · tree and pragmatics
description: Heavy, pointed things dropped from a height really are dangerous, which is why building sites need hard hats. Who acts: Heavy pointed things, building sites. A sentence of the lesson «Parachutes, skydivers and falling safely» of the physics course of Mova's primary school with its dependency tree an
---

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# Parachutes, skydivers and falling safely, sentence 16

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Heavy, pointed things dropped from a height really are dangerous, which is why building sites need hard hats.

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**Who acts:** Heavy pointed things, building sites · **What happens:** drop, be, need · **To what, where:** Heavy pointed things, height, hard hats

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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 (Heavy pointed things, building sites), 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:16
# text = Heavy, pointed things dropped from a height really are dangerous, which is why building sites need hard hats.
# 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): no change
1	Heavy	heavy	ADJ	JJ	Degree=Pos	4	amod	_	_
2	,	,	PUNCT	,	_	1	punct	_	_
3	pointed	pointed	ADJ	JJ	Degree=Pos	4	amod	_	_
4	things	thing	NOUN	NNS	Number=Plur	11	nsubj	_	_
5	dropped	drop	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	acl	_	_
6	from	from	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	height	height	NOUN	NN	Number=Sing	5	obl	_	_
9	really	really	ADV	RB	_	5	advmod	_	_
10	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	11	cop	_	_
11	dangerous	dangerous	ADJ	JJ	Degree=Pos	0	root	_	_
12	,	,	PUNCT	,	_	18	punct	_	_
13	which	which	PRON	WDT	PronType=Rel	15	nsubj	_	_
14	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	15	cop	_	_
15	why	why	ADV	WRB	PronType=Int	11	parataxis	_	_
16	building	building	NOUN	NN	Number=Sing	17	compound	_	_
17	sites	site	NOUN	NNS	Number=Plur	18	nsubj	_	_
18	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	15	acl:relcl	_	_
19	hard	hard	ADJ	JJ	Degree=Pos	20	amod	_	_
20	hats	hat	NOUN	NNS	Number=Plur	18	obj	_	_
21	.	.	PUNCT	.	_	11	punct	_	_
```

## Pragmatics {#pragmatics}

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

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **drop** | participle |  | Heavy pointed things *not said here* |  | a height |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme from height=Trajectory |
| 2 | **is** | present | Heavy pointed things |  |  |  |  | dangerous *property* | tree rules |
| 3 | **is** | present |  |  |  |  |  | why *property* | tree rules |
| 4 | **need** | present | building sites | hard hats |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot hat=Theme |

<!-- .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: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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