---
title: The Caspian Sea is the world's largest lake by area, at about 370,00… — Islands, seas and lakes · tree and pragmatics
description: The Caspian Sea is the world's largest lake by area, at about 370,000 square kilometres, and its water is salty, though only about a third as salty as the ocean; rivers such as the Volga flow in, but none flows out, so water leaves only by evaporating and the salt stays behind. Who acts: Caspian Sea
---

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# Islands, seas and lakes, sentence 10

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The Caspian Sea is the world's largest lake by area, at about 370,000 square kilometres, and its water is salty, though only about a third as salty as the ocean; rivers such as the Volga flow in, but none flows out, so water leaves only by evaporating and the salt stays behind.

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**Who acts:** Caspian Sea, water, rivers, none, salt · **What happens:** be, flow, flow out, leave, evaporate, stay · **To what, where:** largest lake, 370,000 square kilometres

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This is a sentence of the lesson «Islands, seas and lakes» 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 (Caspian Sea, water, rivers, none), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:geography:006-islands-seas-and-lakes.lesson:10
# text = The Caspian Sea is the world's largest lake by area, at about 370,000 square kilometres, and its water is salty, though only about a third as salty as the ocean; rivers such as the Volga flow in, but none flows out, so water leaves only by evaporating and the salt stays behind.
# source = school lesson (ours)
# course = geography
# lesson = 006-islands-seas-and-lakes.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, R7-rel-agree ×3
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	Caspian	Caspian	PROPN	NNP	Number=Sing	3	compound	_	_
3	Sea	Sea	PROPN	NNP	Number=Sing	9	nsubj	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	world	world	NOUN	NN	Number=Sing	9	nmod:poss	_	_
7	's	's	PART	POS	_	6	case	_	_
8	largest	large	ADJ	JJS	Degree=Sup	9	amod	_	_
9	lake	lake	NOUN	NN	Number=Sing	0	root	_	_
10	by	by	ADP	IN	_	11	case	_	_
11	area	area	NOUN	NN	Number=Sing	9	nmod	_	_
12	,	,	PUNCT	,	_	17	punct	_	_
13	at	at	ADP	IN	_	17	case	_	_
14	about	about	ADV	RB	_	15	advmod	_	_
15	370,000	370,000	NUM	CD	NumForm=Digit|NumType=Card	17	nummod	_	_
16	square	square	ADJ	JJ	Degree=Pos	17	amod	_	Agree=R7-rel-agree|Haiku=17:compound|HaikuPos=NOUN:NN:Number=Sing
17	kilometres	kilometre	NOUN	NNS	Number=Plur	9	obl	_	_
18	,	,	PUNCT	,	_	23	punct	_	_
19	and	and	CCONJ	CC	_	23	cc	_	_
20	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	21	nmod:poss	_	_
21	water	water	NOUN	NN	Number=Sing	23	nsubj	_	_
22	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	23	cop	_	_
23	salty	salty	ADJ	JJ	Degree=Pos	9	conj	_	Agree=R7-rel-agree|Haiku=9:parataxis
24	,	,	PUNCT	,	_	29	punct	_	_
25	though	though	ADV	RB	_	29	advmod	_	_
26	only	only	ADV	RB	_	29	advmod	_	_
27	about	about	ADV	RB	_	29	advmod	_	Agree=R7-rel-agree|Haiku=29:case|HaikuPos=ADP:IN:_
28	a	a	DET	DT	Definite=Ind|PronType=Art	29	det	_	_
29	third	third	NOUN	NN	Number=Sing|NumForm=Word|NumType=Ord	23	conj	_	_
30	as	as	ADV	RB	_	31	advmod	_	_
31	salty	salty	ADJ	JJ	Degree=Pos	29	amod	_	_
32	as	as	ADP	IN	_	34	case	_	_
33	the	the	DET	DT	Definite=Def|PronType=Art	34	det	_	_
34	ocean	ocean	NOUN	NN	Number=Sing	31	nmod	_	_
35	;	;	PUNCT	,	_	36	punct	_	_
36	rivers	river	NOUN	NNS	Number=Plur	41	nsubj	_	_
37	such	such	ADJ	JJ	Degree=Pos|ExtPos=ADP	40	case	_	_
38	as	as	ADP	IN	_	37	fixed	_	_
39	the	the	DET	DT	Definite=Def|PronType=Art	40	det	_	Agree=R5-strong|Haiku=41:det
40	Volga	Volga	PROPN	NNP	Number=Sing	36	nmod	_	_
41	flow	flow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	parataxis	_	_
42	in	in	ADV	RB	_	41	advmod	_	_
43	,	,	PUNCT	,	_	46	punct	_	_
44	but	but	CCONJ	CC	_	46	cc	_	_
45	none	none	PRON	NN	PronType=Neg	46	nsubj	_	_
46	flows	flow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	41	conj	_	_
47	out	out	ADP	RP	_	46	compound:prt	_	_
48	,	,	PUNCT	,	_	51	punct	_	_
49	so	so	ADV	RB	_	51	advmod	_	_
50	water	water	NOUN	NN	Number=Sing	51	nsubj	_	_
51	leaves	leave	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	conj	_	_
52	only	only	ADV	RB	_	54	advmod	_	_
53	by	by	SCONJ	IN	_	54	mark	_	_
54	evaporating	evaporate	VERB	VBG	VerbForm=Ger	51	advcl	_	_
55	and	and	CCONJ	CC	_	58	cc	_	_
56	the	the	DET	DT	Definite=Def|PronType=Art	57	det	_	_
57	salt	salt	NOUN	NN	Number=Sing	58	nsubj	_	_
58	stays	stay	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	51	conj	_	Agree=R5-strong|Haiku=54:conj
59	behind	behind	ADV	RB	_	58	advmod	_	_
60	.	.	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 | **is a** | present | the Caspian Sea | the world's largest lake |  | 370,000 square kilometres |  | by area | tree rules |
| 2 | **is** | present | sea's water |  |  |  |  | salty *property* | tree rules |
| 3 | **flow** | present | rivers such the Volga |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |
| 4 | **flow out** | present | none |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |
| 5 | **leave** | present | water |  |  |  |  |  | vn escape-51.1-1-1 «NP V»: agent=Theme |
| 6 | **evaporate** | gerund | water *not said here* |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |
| 7 | **stay** | present | the salt |  |  |  |  | behind *property* | vn exist-47.1 «NP V»: agent=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:geography:006-islands-seas-and-lakes.lesson:10`.

**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, R7-rel-agree ×3. **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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