---
title: Billions of years ago, cyanobacteria made the first oxygen in the ai… — The microscopic world: bacteria, good and bad · tree and pragmatics
description: Billions of years ago, cyanobacteria made the first oxygen in the air by photosynthesis, and the rocks they built, called stromatolites, still grow in Shark Bay, Australia. Who acts: cyanobacteria, rocks. A sentence of the lesson «The microscopic world: bacteria, good and bad» of the biology course 
---

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# The microscopic world: bacteria, good and bad, sentence 17

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Billions of years ago, cyanobacteria made the first oxygen in the air by photosynthesis, and the rocks they built, called stromatolites, still grow in Shark Bay, Australia.

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**Who acts:** cyanobacteria, rocks · **What happens:** make, build, call, grow · **To what, where:** first oxygen, air, rocks, stromatolites, Shark Bay · **Speech:** someone speaks here

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This is a sentence of the lesson «The microscopic world: bacteria, good and bad» 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 (cyanobacteria, rocks), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:257-the-microscopic-world-bacteria-good-and-bad.lesson:17
# text = Billions of years ago, cyanobacteria made the first oxygen in the air by photosynthesis, and the rocks they built, called stromatolites, still grow in Shark Bay, Australia.
# source = school lesson (ours)
# course = biology
# lesson = 257-the-microscopic-world-bacteria-good-and-bad.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): R5-strong ×2
1	Billions	billion	NOUN	NNS	Number=Plur	4	obl:unmarked	_	Agree=R5-strong|Haiku=7:obl:unmarked
2	of	of	ADP	IN	_	3	case	_	_
3	years	year	NOUN	NNS	Number=Plur	1	nmod	_	_
4	ago	ago	ADV	RB	_	7	advmod	_	_
5	,	,	PUNCT	,	_	4	punct	_	_
6	cyanobacteria	cyanobacteria	NOUN	NNS	Number=Plur	7	nsubj	_	_
7	made	make	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
9	first	first	ADJ	JJ	Degree=Pos|NumForm=Word|NumType=Ord	10	amod	_	_
10	oxygen	oxygen	NOUN	NN	Number=Sing	7	obj	_	_
11	in	in	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	air	air	NOUN	NN	Number=Sing	7	obl	_	_
14	by	by	ADP	IN	_	15	case	_	_
15	photosynthesis	photosynthesis	NOUN	NN	Number=Sing	7	obl	_	Agree=R5-strong|Haiku=13:nmod
16	,	,	PUNCT	,	_	27	punct	_	_
17	and	and	CCONJ	CC	_	27	cc	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
19	rocks	rock	NOUN	NNS	Number=Plur	27	nsubj	_	_
20	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	21	nsubj	_	_
21	built	build	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	19	acl:relcl	_	_
22	,	,	PUNCT	,	_	24	punct	_	_
23	called	call	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	24	acl	_	_
24	stromatolites	stromatolite	NOUN	NNS	Number=Plur	19	conj	_	_
25	,	,	PUNCT	,	_	19	punct	_	_
26	still	still	ADV	RB	_	27	advmod	_	_
27	grow	grow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	conj	_	_
28	in	in	ADP	IN	_	30	case	_	_
29	Shark	Shark	PROPN	NNP	Number=Sing	30	compound	_	_
30	Bay	Bay	PROPN	NNP	Number=Sing	27	obl	_	_
31	,	,	PUNCT	,	_	30	punct	_	_
32	Australia	Australia	PROPN	NNP	Number=Sing	30	appos	_	_
33	.	.	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 | **make** | past | cyanobacteria | the first oxygen |  | the air |  | by photosynthesis; ago *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset oxygen=Product |
| 2 | **build** | past | rocks *= rock* | the rocks and stromatolites *not said here* |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset rock=Product |
| 3 | **call** | participle |  | stromatolites *not said here* |  |  |  |  | vn initiate\_communication-37.4.2-1 «NP V»: agent=Agent |
| 4 | **grow** | present | the rocks and stromatolites |  |  | Shark Bay | still |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme in bay=Location |

<!-- .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:257-the-microscopic-world-bacteria-good-and-bad.lesson:17`.

**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): R5-strong ×2. **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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