---
title: The Coriolis effect is real and makes hurricanes spin opposite ways… — Water, deserts and the shape of the land · tree and pragmatics
description: The Coriolis effect is real and makes hurricanes spin opposite ways in the north and south of the world, but it is far too weak to decide which way a sink or toilet drains. Who acts: Coriolis effect, hurricanes, effect, sink. A sentence of the lesson «Water, deserts and the shape of the land» of the
---

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# Water, deserts and the shape of the land, sentence 10

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The Coriolis effect is real and makes hurricanes spin opposite ways in the north and south of the world, but it is far too weak to decide which way a sink or toilet drains.

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**Who acts:** Coriolis effect, hurricanes, effect, sink · **What happens:** be, make, spin, decide, drain · **To what, where:** opposite ways, north, way · **Speech:** someone speaks here

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This is a sentence of the lesson «Water, deserts and the shape of the land» of the myths 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 (Coriolis effect, hurricanes, effect, sink), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:myths:016-water-deserts-and-the-shape-of-the-land.lesson:10
# text = The Coriolis effect is real and makes hurricanes spin opposite ways in the north and south of the world, but it is far too weak to decide which way a sink or toilet drains.
# source = school lesson (ours)
# course = myths
# lesson = 016-water-deserts-and-the-shape-of-the-land.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): R5-strong ×2, R7-rel-agree ×3
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	Coriolis	Coriolis	PROPN	NNP	Number=Sing	3	compound	_	_
3	effect	effect	NOUN	NN	Number=Sing	5	nsubj	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
5	real	real	ADJ	JJ	Degree=Pos	0	root	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	conj	_	_
8	hurricanes	hurricane	NOUN	NNS	Number=Plur	9	nsubj	_	_
9	spin	spin	VERB	VB	VerbForm=Inf	7	xcomp	_	Agree=R7-rel-agree|Haiku=7:ccomp|HaikuPos=VERB:VBP:Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
10	opposite	opposite	ADJ	JJ	Degree=Pos	11	amod	_	_
11	ways	way	NOUN	NNS	Number=Plur	9	obj	_	_
12	in	in	ADP	IN	_	14	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	north	north	NOUN	NN	Number=Sing	9	obl	_	Agree=R5-strong|Haiku=11:nmod
15	and	and	CCONJ	CC	_	16	cc	_	_
16	south	south	NOUN	NN	Number=Sing	14	conj	_	_
17	of	of	ADP	IN	_	19	case	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
19	world	world	NOUN	NN	Number=Sing	14	nmod	_	_
20	,	,	PUNCT	,	_	26	punct	_	_
21	but	but	CCONJ	CC	_	26	cc	_	_
22	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	26	nsubj	_	_
23	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	26	cop	_	_
24	far	far	ADV	RB	Degree=Pos	26	advmod	_	_
25	too	too	ADV	RB	_	26	advmod	_	_
26	weak	weak	ADJ	JJ	Degree=Pos	5	conj	_	_
27	to	to	PART	TO	_	28	mark	_	_
28	decide	decide	VERB	VB	VerbForm=Inf	26	advcl	_	_
29	which	which	DET	WDT	PronType=Int	30	det	_	_
30	way	way	NOUN	NN	Number=Sing	28	obj	_	_
31	a	a	DET	DT	Definite=Ind|PronType=Art	32	det	_	Agree=R5-strong|Haiku=35:det
32	sink	sink	NOUN	NN	Number=Sing	35	nsubj	_	Agree=R7-rel-agree|Haiku=35:compound
33	or	or	CCONJ	CC	_	34	cc	_	_
34	toilet	toilet	NOUN	NN	Number=Sing	32	conj	_	_
35	drains	drain	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	28	ccomp	_	Agree=R7-rel-agree|Haiku=28:obj|HaikuPos=NOUN:NNS:Number=Plur
36	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | the Coriolis effect |  |  |  |  | real *property* | tree rules |
| 2 | **make** | present | the Coriolis effect *not said here* |  |  |  |  |  | tree rules |
| 3 | **spin** | infinitive | hurricanes | opposite ways |  | the north of the world and south |  |  | vn roll-51.3.1 «NP V NP.theme»: agent=Agent way=Theme |
| 4 | **is** | present | effect |  |  |  |  | far, weak *property* | tree rules |
| 5 | **decide** | to-infinitive | effect *not said here* | which way |  |  |  |  | vn correspond-36.1-1 «NP V PP.co-agent that S»: agent=Agent way=Co-Agent clause=Topic |
| 6 | **drain** | present | a sink or toilet |  |  |  |  |  | vn clear-10.3-1 «NP.Source V»: agent=Source |

<!-- .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:myths:016-water-deserts-and-the-shape-of-the-land.lesson:10`.

**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): R5-strong ×2, R7-rel-agree ×3. **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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- next →: [Water, deserts and the shape of the land, 11](https://md.mova.elamur.ai/free/en/corpora/school/myths/16-water-deserts-and-the-shape-of-the-land/11/)
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