---
title: A train is a long chain of carriages or wagons rolling on two steel… — Trains and the Underground · tree and pragmatics
description: A train is a long chain of carriages or wagons rolling on two steel rails. Who acts: train, carriages. A sentence of the lesson «Trains and the Underground» of the technology course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Trains and the Underground, sentence 0

<!-- .ven lang=en -->
A train is a long chain of carriages or wagons rolling on two steel rails.

<!-- .vintro -->
**Who acts:** train, carriages · **What happens:** be, roll · **To what, where:** long chain, two steel rails

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This is a sentence of the lesson «Trains and the Underground» 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 (train, carriages), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:technology:021-trains-and-the-underground.lesson:0
# text = A train is a long chain of carriages or wagons rolling on two steel rails.
# source = school lesson (ours)
# course = technology
# lesson = 021-trains-and-the-underground.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	2	det	_	_
2	train	train	NOUN	NN	Number=Sing	6	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	long	long	ADJ	JJ	Degree=Pos	6	amod	_	_
6	chain	chain	NOUN	NN	Number=Sing	0	root	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	carriages	carriage	NOUN	NNS	Number=Plur	6	nmod	_	_
9	or	or	CCONJ	CC	_	10	cc	_	_
10	wagons	wagon	NOUN	NNS	Number=Plur	8	conj	_	_
11	rolling	roll	VERB	VBG	VerbForm=Ger	8	acl	_	Agree=R5-strong|Haiku=10:acl
12	on	on	ADP	IN	_	15	case	_	_
13	two	two	NUM	CD	NumForm=Word|NumType=Card	15	nummod	_	_
14	steel	steel	NOUN	NN	Number=Sing	15	compound	_	_
15	rails	rail	NOUN	NNS	Number=Plur	11	obl	_	_
16	.	.	PUNCT	.	_	6	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 | **is a** | present | a train | a long chain |  |  |  | of carriages or wagons | tree rules |
| 2 | **roll** | gerund | carriages or wagons *not said here* |  |  | two steel rails |  |  | vn run-51.3.2-2 «NP V PP.location»: agent=Theme on rail=Trajectory |

<!-- .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:021-trains-and-the-underground.lesson:0`.

**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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- ← previous: [Buses, trams, lorries and traffic lights, 18](https://md.mova.elamur.ai/free/en/corpora/school/technology/20-buses-trams-lorries-and-traffic-lights/18/)
- next →: [Trains and the Underground, 1](https://md.mova.elamur.ai/free/en/corpora/school/technology/21-trains-and-the-underground/1/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/technology/21-trains-and-the-underground/)