---
title: European eels swim thousands of kilometres to the Sargasso Sea to la… — Migration: the great journeys · tree and pragmatics
description: European eels swim thousands of kilometres to the Sargasso Sea to lay eggs, and the babies drift back on ocean currents; nobody has ever seen them lay eggs in the wild. Who acts: European eels, babies, nobody, thousands. A sentence of the lesson «Migration: the great journeys» of the biology course 
---

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# Migration: the great journeys, sentence 12

<!-- .ven lang=en -->
European eels swim thousands of kilometres to the Sargasso Sea to lay eggs, and the babies drift back on ocean currents; nobody has ever seen them lay eggs in the wild.

<!-- .vintro -->
**Who acts:** European eels, babies, nobody, thousands · **What happens:** swim, lay, drift back, see · **To what, where:** thousands, eggs, ocean currents, wild

<!-- .vabout -->
This is a sentence of the lesson «Migration: the great journeys» 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 (European eels, babies, nobody, thousands), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:054-migration-the-great-journeys.lesson:12
# text = European eels swim thousands of kilometres to the Sargasso Sea to lay eggs, and the babies drift back on ocean currents; nobody has ever seen them lay eggs in the wild.
# source = school lesson (ours)
# course = biology
# lesson = 054-migration-the-great-journeys.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 ×1, R8-pos-agree ×1
1	European	European	ADJ	JJ	Degree=Pos	2	amod	_	_
2	eels	eel	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	swim	swim	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	thousands	thousand	NOUN	NNS	Number=Plur	3	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	kilometres	kilometre	NOUN	NNS	Number=Plur	4	nmod	_	_
7	to	to	ADP	IN	_	10	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
9	Sargasso	Sargasso	PROPN	NNP	Number=Sing	10	compound	_	_
10	Sea	Sea	PROPN	NNP	Number=Sing	3	obl	_	_
11	to	to	PART	TO	_	12	mark	_	_
12	lay	lay	VERB	VB	VerbForm=Inf	3	advcl	_	_
13	eggs	egg	NOUN	NNS	Number=Plur	12	obj	_	_
14	,	,	PUNCT	,	_	18	punct	_	_
15	and	and	CCONJ	CC	_	18	cc	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	babies	baby	NOUN	NNS	Number=Plur	18	nsubj	_	_
18	drift	drift	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	Agree=R8-pos-agree|Haiku=3:conj|HaikuPos=VERB:VB:VerbForm=Inf
19	back	back	ADV	RB	_	18	advmod	_	_
20	on	on	ADP	IN	_	22	case	_	_
21	ocean	ocean	NOUN	NN	Number=Sing	22	compound	_	_
22	currents	current	NOUN	NNS	Number=Plur	18	obl	_	Agree=R5-strong|Haiku=19:obl
23	;	;	PUNCT	,	_	27	punct	_	_
24	nobody	nobody	PRON	NN	Number=Sing|PronType=Neg	27	nsubj	_	_
25	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	27	aux	_	_
26	ever	ever	ADV	RB	PronType=Ind	27	advmod	_	_
27	seen	see	VERB	VBN	Tense=Past|VerbForm=Part	3	parataxis	_	_
28	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	27	obj	_	_
29	lay	lay	VERB	VB	VerbForm=Inf	27	xcomp	_	_
30	eggs	egg	NOUN	NNS	Number=Plur	29	obj	_	_
31	in	in	ADP	IN	_	33	case	_	_
32	the	the	DET	DT	Definite=Def|PronType=Art	33	det	_	_
33	wild	wild	NOUN	NN	Number=Sing	29	obl	_	_
34	.	.	PUNCT	.	_	3	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 | **swim** | present | European eels | thousands of kilometres |  |  |  | to the Sargasso Sea | vn run-51.3.2-1 «NP V NP»: agent=Theme thousand=Trajectory |
| 2 | **lay** | to-infinitive | European eels *not said here* | eggs |  |  |  |  | vn create-26.4 «NP V NP»: agent=Agent egg=Result |
| 3 | **drift back** | present | the babies |  |  | ocean currents |  |  | vn run-51.3.2-2 «NP V PP.location»: agent=Theme on current=Trajectory |
| 4 | **see** | present · perfect | nobody | thousands *= thousand* |  |  | ever |  | tree rules |
| 5 | **lay** | infinitive | thousands *= thousand* *not said here* | eggs |  | the wild |  |  | vn put\_spatial-9.2 «NP V NP PP.destination»: agent=Agent egg=Theme in wild=Destination |

<!-- .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:054-migration-the-great-journeys.lesson:12`.

**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 ×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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