---
title: A delta is flat land built from the mud and sand a river drops where… — Mountains, rivers and seas, and how the land is… · tree and pragmatics
description: A delta is flat land built from the mud and sand a river drops where it slows down at its mouth. Who acts: delta, river. A sentence of the lesson «Mountains, rivers and seas, and how the land is shaped» of the world course of Mova's primary school with its dependency tree and the pragmatics of every
---

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# Mountains, rivers and seas, and how the land is shaped, sentence 13

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A delta is flat land built from the mud and sand a river drops where it slows down at its mouth.

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**Who acts:** delta, river · **What happens:** be, build, drop, slow down · **To what, where:** flat land, mud, mouth

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This is a sentence of the lesson «Mountains, rivers and seas, and how the land is shaped» of the world 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 (delta, river), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:043-landforms.lesson:13
# text = A delta is flat land built from the mud and sand a river drops where it slows down at its mouth.
# source = school lesson (ours)
# course = world
# lesson = 043-landforms.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): R1-cc-next ×1, R8-pos-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	delta	delta	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	flat	flat	ADJ	JJ	Degree=Pos	5	amod	_	_
5	land	land	NOUN	NN	Number=Sing	0	root	_	_
6	built	build	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	5	acl	_	_
7	from	from	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	mud	mud	NOUN	NN	Number=Sing	6	obl	_	_
10	and	and	CCONJ	CC	_	11	cc	_	Agree=R1-cc-next|Haiku=9:cc
11	sand	sand	NOUN	NN	Number=Sing	9	conj	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	river	river	NOUN	NN	Number=Sing	14	nsubj	_	_
14	drops	drop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	acl:relcl	_	_
15	where	where	ADV	WRB	PronType=Rel	17	advmod	_	_
16	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	17	nsubj	_	_
17	slows	slow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	advcl	_	_
18	down	down	ADP	RP	_	17	compound:prt	_	Agree=R8-pos-agree|Haiku=17:compound:prt|HaikuPos=PART:RP:_
19	at	at	ADP	IN	_	21	case	_	_
20	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	21	nmod:poss	_	_
21	mouth	mouth	NOUN	NN	Number=Sing	17	obl	_	_
22	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

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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 delta | flat land |  |  |  |  | tree rules |
| 2 | **build** | participle |  | flat land *not said here* |  | the mud and sand |  |  | vn build-26.1-1 «NP.asset V PP»: agent=Asset from mud=Material |
| 3 | **drop** | present | a river | the mud and sand *not said here* |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent mud=Theme |
| 4 | **slow down** | present | river |  |  | river's mouth |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

<!-- .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:world:043-landforms.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): R1-cc-next ×1, R8-pos-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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