---
title: A canal lock lifts or lowers boats by filling or emptying a chamber… — Ships, ports and submarines · tree and pragmatics
description: A canal lock lifts or lowers boats by filling or emptying a chamber between gates; the Panama Canal's locks lift ships about 26 metres. Who acts: locks. A sentence of the lesson «Ships, ports and submarines» of the technology course of Mova's primary school with its dependency tree and the pragmatic
---

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# Ships, ports and submarines, sentence 17

<!-- .ven lang=en -->
A canal lock lifts or lowers boats by filling or emptying a chamber between gates; the Panama Canal's locks lift ships about 26 metres.

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**Who acts:** locks · **What happens:** lift, lower, fill, empty · **To what, where:** boats, chamber, ships

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This is a sentence of the lesson «Ships, ports and submarines» of the technology 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 (locks), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:technology:024-ships-ports-and-submarines.lesson:17
# text = A canal lock lifts or lowers boats by filling or emptying a chamber between gates; the Panama Canal's locks lift ships about 26 metres.
# source = school lesson (ours)
# course = technology
# lesson = 024-ships-ports-and-submarines.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
1	A	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
2	canal	canal	NOUN	NN	Number=Sing	3	compound	_	Agree=R5-strong|Haiku=4:compound
3	lock	lock	NOUN	NN	Number=Sing	4	compound	_	_
4	lifts	lift	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	or	or	CCONJ	CC	_	6	cc	_	_
6	lowers	lower	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	conj	_	_
7	boats	boat	NOUN	NNS	Number=Plur	6	obj	_	_
8	by	by	SCONJ	IN	_	9	mark	_	_
9	filling	fill	VERB	VBG	VerbForm=Ger	6	advcl	_	_
10	or	or	CCONJ	CC	_	11	cc	_	_
11	emptying	empty	VERB	VBG	VerbForm=Ger	9	conj	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	chamber	chamber	NOUN	NN	Number=Sing	11	obj	_	_
14	between	between	ADP	IN	_	15	case	_	_
15	gates	gate	NOUN	NNS	Number=Plur	13	nmod	_	_
16	;	;	PUNCT	,	_	22	punct	_	_
17	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
18	Panama	Panama	PROPN	NNP	Number=Sing	19	compound	_	_
19	Canal	Canal	PROPN	NNP	Number=Sing	21	nmod:poss	_	_
20	's	's	PART	POS	_	19	case	_	_
21	locks	lock	NOUN	NNS	Number=Plur	22	nsubj	_	_
22	lift	lift	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	conj	_	_
23	ships	ship	NOUN	NNS	Number=Plur	22	obj	_	_
24	about	about	ADV	RB	_	25	advmod	_	_
25	26	26	NUM	CD	NumForm=Digit|NumType=Card	26	nummod	_	_
26	metres	metre	NOUN	NNS	Number=Plur	22	obl:unmarked	_	_
27	.	.	PUNCT	.	_	4	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **lift** | present |  |  |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent |
| 2 | **lower** | present |  | boats |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent boat=Theme |
| 3 | **fill** | gerund |  |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |
| 4 | **empty** | gerund |  | a chamber |  |  |  | between gates | vn clear-10.3-1 «NP V NP.source»: agent=Agent chamber=Source |
| 5 | **lift** | present | the Panama Canal's locks | ships |  |  |  | 26 metres *obl:unmarked* | vn put\_direction-9.4 «NP V NP»: agent=Agent ship=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:technology:024-ships-ports-and-submarines.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 ×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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