---
title: Running water is the most powerful agent of erosion on Earth. — Weathering and erosion · tree and pragmatics
description: Running water is the most powerful agent of erosion on Earth. Who acts: Running water. A sentence of the lesson «Weathering and erosion» of the geography course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Weathering and erosion, sentence 13

<!-- .ven lang=en -->
Running water is the most powerful agent of erosion on Earth.

<!-- .vintro -->
**Who acts:** Running water · **What happens:** run, be · **To what, where:** powerful agent, Earth

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This is a sentence of the lesson «Weathering and erosion» of the geography 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 (Running water), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:geography:052-weathering-and-erosion.lesson:13
# text = Running water is the most powerful agent of erosion on Earth.
# source = school lesson (ours)
# course = geography
# lesson = 052-weathering-and-erosion.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	Running	run	VERB	VBG	Tense=Pres|VerbForm=Part	2	amod	_	_
2	water	water	NOUN	NN	Number=Sing	7	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
5	most	most	ADV	RBS	Degree=Sup	6	advmod	_	_
6	powerful	powerful	ADJ	JJ	Degree=Pos	7	amod	_	_
7	agent	agent	NOUN	NN	Number=Sing	0	root	_	_
8	of	of	ADP	IN	_	9	case	_	_
9	erosion	erosion	NOUN	NN	Number=Sing	7	nmod	_	_
10	on	on	ADP	IN	_	11	case	_	_
11	Earth	Earth	PROPN	NNP	Number=Sing	7	nmod	_	Agree=R7-rel-agree|Haiku=7:obl
12	.	.	PUNCT	.	_	7	punct	_	_
```

## Pragmatics {#pragmatics}

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

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **run** | gerund |  |  |  |  |  |  | vn run-51.3.2-2-1 «NP V»: agent=Theme |
| 2 | **is a** | present | Running water | the powerful agent |  | Earth |  | of erosion | tree rules |

<!-- .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:geography:052-weathering-and-erosion.lesson:13`.

**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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