---
title: A drop of seawater under the school microscope wriggles with plankto… — The ocean: open sea, sunlit zone and the deep dark · tree and pragmatics
description: A drop of seawater under the school microscope wriggles with plankton, tiny drifting algae and animals; they are the bottom of the ocean food chain, and the tiny algae among them make about half the oxygen we breathe. Who acts: drop, animals, tiny algae, we. A sentence of the lesson «The ocean: open
---

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# The ocean: open sea, sunlit zone and the deep dark, sentence 2

<!-- .ven lang=en -->
A drop of seawater under the school microscope wriggles with plankton, tiny drifting algae and animals; they are the bottom of the ocean food chain, and the tiny algae among them make about half the oxygen we breathe.

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**Who acts:** drop, animals, tiny algae, we · **What happens:** wriggle, drift, be, make, breathe · **To what, where:** bottom, oxygen

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This is a sentence of the lesson «The ocean: open sea, sunlit zone and the deep dark» of the biology 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 (drop, animals, tiny algae, we), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:008-the-ocean.lesson:2
# text = A drop of seawater under the school microscope wriggles with plankton, tiny drifting algae and animals; they are the bottom of the ocean food chain, and the tiny algae among them make about half the oxygen we breathe.
# source = school lesson (ours)
# course = biology
# lesson = 008-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): R1-cc-next ×2, R3-conj-first ×1, R5-strong ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	drop	drop	NOUN	NN	Number=Sing	9	nsubj	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	seawater	seawater	NOUN	NN	Number=Sing	2	nmod	_	_
5	under	under	ADP	IN	_	9	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	Agree=R5-strong|Haiku=9:det
7	school	school	NOUN	NN	Number=Sing	8	compound	_	_
8	microscope	microscope	NOUN	NN	Number=Sing	9	compound	_	_
9	wriggles	wriggle	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
10	with	with	ADP	IN	_	11	case	_	_
11	plankton	plankton	NOUN	NN	Number=Sing	9	obl	_	_
12	,	,	PUNCT	,	_	15	punct	_	_
13	tiny	tiny	ADJ	JJ	Degree=Pos	15	amod	_	_
14	drifting	drift	VERB	VBG	VerbForm=Ger	15	amod	_	_
15	algae	alga	NOUN	NNS	Number=Plur	11	appos	_	_
16	and	and	CCONJ	CC	_	17	cc	_	Agree=R1-cc-next|Haiku=15:cc
17	animals	animal	NOUN	NNS	Number=Plur	15	conj	_	_
18	;	;	PUNCT	,	_	22	punct	_	_
19	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	22	nsubj	_	_
20	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	22	cop	_	_
21	the	the	DET	DT	Definite=Def|PronType=Art	22	det	_	_
22	bottom	bottom	NOUN	NN	Number=Sing	9	conj	_	_
23	of	of	ADP	IN	_	27	case	_	_
24	the	the	DET	DT	Definite=Def|PronType=Art	27	det	_	_
25	ocean	ocean	NOUN	NN	Number=Sing	27	compound	_	_
26	food	food	NOUN	NN	Number=Sing	27	compound	_	_
27	chain	chain	NOUN	NN	Number=Sing	22	nmod	_	_
28	,	,	PUNCT	,	_	35	punct	_	_
29	and	and	CCONJ	CC	_	35	cc	_	Agree=R1-cc-next|Haiku=22:cc
30	the	the	DET	DT	Definite=Def|PronType=Art	32	det	_	_
31	tiny	tiny	ADJ	JJ	Degree=Pos	32	amod	_	_
32	algae	alga	NOUN	NNS	Number=Plur	35	nsubj	_	_
33	among	among	ADP	IN	_	34	case	_	_
34	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	32	nmod	_	_
35	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	conj	_	Agree=R3-conj-first|Haiku=22:conj
36	about	about	ADV	RB	_	37	advmod	_	_
37	half	half	DET	PDT	NumForm=Word|NumType=Frac|PronType=Ind	39	det:predet	_	_
38	the	the	DET	DT	Definite=Def|PronType=Art	39	det	_	_
39	oxygen	oxygen	NOUN	NN	Number=Sing	35	obj	_	_
40	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	41	nsubj	_	_
41	breathe	breathe	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	39	acl:relcl	_	_
42	.	.	PUNCT	.	_	9	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 | **wriggle** | present | a drop of seawater |  |  |  |  | with plankton | vn body\_internal\_motion-49.1 «NP V»: agent=Agent |
| 2 | **drift** | gerund |  |  |  |  |  |  | vn run-51.3.2-2 «NP V»: agent=Theme |
| 3 | **is a** | present | animals *= animal* | the bottom |  |  |  | of the ocean food chain | tree rules |
| 4 | **make** | present | the tiny algae among animals | half oxygen |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset oxygen=Product |
| 5 | **breathe** | present | we | half oxygen *not said here* |  |  |  |  | vn breathe-40.1.2-1 «NP V NP»: agent=Agent oxygen=Theme |

<!-- .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:biology:008-the-ocean.lesson:2`.

**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 ×2, R3-conj-first ×1, R5-strong ×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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