---
title: Most of the Earth's volcanic activity happens unseen on the ocean fl… — Volcanoes: how and where · tree and pragmatics
description: Most of the Earth's volcanic activity happens unseen on the ocean floor along mid-ocean ridges. Who acts: Most. A sentence of the lesson «Volcanoes: how and where» of the geography course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Volcanoes: how and where, sentence 14

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Most of the Earth's volcanic activity happens unseen on the ocean floor along mid-ocean ridges.

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**Who acts:** Most · **What happens:** happen · **To what, where:** ocean floor

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This is a sentence of the lesson «Volcanoes: how and where» 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 (Most), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:geography:046-volcanoes-how-and-where.lesson:14
# text = Most of the Earth's volcanic activity happens unseen on the ocean floor along mid-ocean ridges.
# source = school lesson (ours)
# course = geography
# lesson = 046-volcanoes-how-and-where.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): no change
1	Most	most	ADJ	JJS	Degree=Sup	8	nsubj	_	_
2	of	of	ADP	IN	_	7	case	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	Earth	Earth	PROPN	NNP	Number=Sing	7	nmod:poss	_	_
5	's	's	PART	POS	_	4	case	_	_
6	volcanic	volcanic	ADJ	JJ	Degree=Pos	7	amod	_	_
7	activity	activity	NOUN	NN	Number=Sing	1	nmod	_	_
8	happens	happen	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	unseen	unseen	ADJ	JJ	Degree=Pos	8	xcomp	_	_
10	on	on	ADP	IN	_	13	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
12	ocean	ocean	NOUN	NN	Number=Sing	13	compound	_	_
13	floor	floor	NOUN	NN	Number=Sing	8	obl	_	_
14	along	along	ADP	IN	_	16	case	_	_
15	mid-ocean	mid-ocean	NOUN	NN	Number=Sing	16	compound	_	_
16	ridges	ridge	NOUN	NNS	Number=Plur	8	obl	_	_
17	.	.	PUNCT	.	_	8	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | present | Most of the Earth's volcanic activity |  |  | the ocean floor |  | along mid-ocean ridges; unseen *property* | vn occur-48.3-1 «NP V PP»: agent=Theme on floor=Location |

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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:geography:046-volcanoes-how-and-where.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): no change. **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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