---
title: A tornado is a column of air spinning very fast with very low pressu… — Wind and weather · tree and pragmatics
description: A tornado is a column of air spinning very fast with very low pressure in its middle, and its winds can rip off roofs and lift cars. Who acts: tornado, column, winds, air. A sentence of the lesson «Wind and weather» of the physics course of Mova's primary school with its dependency tree and the prag
---

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# Wind and weather, sentence 14

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A tornado is a column of air spinning very fast with very low pressure in its middle, and its winds can rip off roofs and lift cars.

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**Who acts:** tornado, column, winds, air · **What happens:** be, spin, rip off, lift, wind · **To what, where:** column, roofs, cars

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This is a sentence of the lesson «Wind and weather» 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 (tornado, column, winds, air), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:015-wind-and-weather.lesson:14
# text = A tornado is a column of air spinning very fast with very low pressure in its middle, and its winds can rip off roofs and lift cars.
# source = school lesson (ours)
# course = physics
# lesson = 015-wind-and-weather.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): R7-rel-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	tornado	tornado	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	column	column	NOUN	NN	Number=Sing	0	root	_	_
6	of	of	ADP	IN	_	7	case	_	_
7	air	air	NOUN	NN	Number=Sing	5	nmod	_	_
8	spinning	spin	VERB	VBG	VerbForm=Ger	5	acl	_	_
9	very	very	ADV	RB	_	10	advmod	_	_
10	fast	fast	ADV	RB	_	8	advmod	_	_
11	with	with	ADP	IN	_	14	case	_	_
12	very	very	ADV	RB	_	13	advmod	_	_
13	low	low	ADJ	JJ	Degree=Pos	14	amod	_	_
14	pressure	pressure	NOUN	NN	Number=Sing	8	obl	_	_
15	in	in	ADP	IN	_	17	case	_	_
16	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	17	nmod:poss	_	_
17	middle	middle	NOUN	NN	Number=Sing	14	nmod	_	_
18	,	,	PUNCT	,	_	23	punct	_	_
19	and	and	CCONJ	CC	_	23	cc	_	_
20	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	21	nmod:poss	_	_
21	winds	wind	NOUN	NNS	Number=Plur	23	nsubj	_	_
22	can	can	AUX	MD	VerbForm=Fin	23	aux	_	_
23	rip	rip	VERB	VB	VerbForm=Inf	5	conj	_	Agree=R7-rel-agree|Haiku=5:parataxis
24	off	off	ADP	RP	_	23	compound:prt	_	_
25	roofs	roof	NOUN	NNS	Number=Plur	23	obj	_	_
26	and	and	CCONJ	CC	_	27	cc	_	_
27	lift	lift	VERB	VB	VerbForm=Inf	23	conj	_	_
28	cars	car	NOUN	NNS	Number=Plur	27	obj	_	_
29	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | a tornado | a column |  |  |  | of air | tree rules |
| 2 | **spin** | gerund | a column *not said here* |  |  |  |  | with low pressure in air's middle; fast *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 3 | **rip off** | can | air's winds | roofs |  |  |  |  | vn break-45.1 «NP V NP»: agent=Agent roof=Patient |
| 4 | **lift** | infinitive | air's winds *not said here* | cars |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent car=Theme |
| 5 | **wind** |  | air |  |  |  |  |  | nom wind «phenomenon transitive»: poss=agent |

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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:physics:015-wind-and-weather.lesson:14`.

**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): R7-rel-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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