---
title: A rip current is water piled up by waves rushing back out to sea thr… — Water safety and the ocean · tree and pragmatics
description: A rip current is water piled up by waves rushing back out to sea through a narrow channel. Who acts: waves. A sentence of the lesson «Water safety and the ocean» of the physics course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Water safety and the ocean, sentence 12

<!-- .ven lang=en -->
A rip current is water piled up by waves rushing back out to sea through a narrow channel.

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**Who acts:** waves · **What happens:** pile up, rush · **To what, where:** rip current, narrow channel

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This is a sentence of the lesson «Water safety and the ocean» 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 (waves), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:013-water-safety-and-the-ocean.lesson:12
# text = A rip current is water piled up by waves rushing back out to sea through a narrow channel.
# source = school lesson (ours)
# course = physics
# lesson = 013-water-safety-and-the-ocean.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	3	det	_	_
2	rip	rip	NOUN	NN	Number=Sing	3	compound	_	Agree=R7-rel-agree|Haiku=3:amod|HaikuPos=ADJ:JJ:Degree=Pos
3	current	current	NOUN	NN	Number=Sing	6	nsubj:pass	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	aux:pass	_	_
5	water	water	NOUN	NN	Number=Sing	6	obl:unmarked	_	_
6	piled	pile	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
7	up	up	ADP	RP	_	6	compound:prt	_	_
8	by	by	ADP	IN	_	9	case	_	_
9	waves	wave	NOUN	NNS	Number=Plur	6	obl:agent	_	_
10	rushing	rush	VERB	VBG	VerbForm=Ger	9	acl	_	_
11	back	back	ADV	RB	_	12	advmod	_	_
12	out	out	ADV	RB	_	14	advmod	_	_
13	to	to	ADP	IN	_	14	case	_	_
14	sea	sea	NOUN	NN	Number=Sing	10	obl	_	_
15	through	through	ADP	IN	_	18	case	_	_
16	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	_	_
17	narrow	narrow	ADJ	JJ	Degree=Pos	18	amod	_	_
18	channel	channel	NOUN	NN	Number=Sing	10	obl	_	_
19	.	.	PUNCT	.	_	6	punct	_	_
```

## Pragmatics {#pragmatics}

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

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **pile up** | present · passive | waves | a rip current |  |  |  | water *obl:unmarked* | vn spray-9.7-1-1 «NP.theme V NP»: agent=Theme subject=Destination |
| 2 | **rush** | gerund | waves *not said here* |  |  | a narrow channel |  | to sea *result* | vn run-51.3.2-2-1 «NP V PP.result»: agent=Theme to sea=Result |

<!-- .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:013-water-safety-and-the-ocean.lesson:12`.

**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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- ← previous: [Water safety and the ocean, 11](https://md.mova.elamur.ai/free/en/corpora/school/physics/13-water-safety-and-the-ocean/11/)
- next →: [Water safety and the ocean, 14](https://md.mova.elamur.ai/free/en/corpora/school/physics/13-water-safety-and-the-ocean/14/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/13-water-safety-and-the-ocean/)