Trains and the Underground, sentence 20

Platform screen doors are glass walls along the platform whose doors open only when the train's doors line up with them, so nobody can fall onto the track.

Who acts: screen doors, doors, nobody · What happens: be, open, line up, fall · To what, where: glass walls, track

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 (screen doors, doors, nobody), what happens, when and where, as Mova's frames read it from the tree.

The tree

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Platform	platform	NOUN	Number=Sing	2 screen	compound
2	screen	screen	NOUN	Number=Sing	3 doors	compound
3	doors	door	NOUN	Number=Plur	6 walls	nsubj
4	are	be	AUX	Mood=Ind Number=Plur Person=3 Tense=Pres VerbForm=Fin	6 walls	cop
5	glass	glass	NOUN	Number=Sing	6 walls	compound
6	walls	wall	NOUN	Number=Plur	root	root
7	along	along	ADP	_	9 platform	case
8	the	the	DET	Definite=Def PronType=Art	9 platform	det
9	platform	platform	NOUN	Number=Sing	6 walls	nmod
10	whose	whose	PRON	Poss=Yes PronType=Rel	11 doors	nmod:poss
11	doors	door	NOUN	Number=Plur	12 open	nsubj
12	open	open	VERB	Mood=Ind Tense=Pres VerbForm=Fin	6 walls	acl:relcl
13	only	only	ADV	_	19 line	advmod
14	when	when	ADV	PronType=Int	19 line	advmod
15	the	the	DET	Definite=Def PronType=Art	16 train	det
16	train	train	NOUN	Number=Sing	18 doors	nmod:poss
17	's	's	PART	_	16 train	case
18	doors	door	NOUN	Number=Plur	19 line	nsubj
19	line	line	VERB	Mood=Ind Tense=Pres VerbForm=Fin	12 open	advcl
20	up	up	ADP	_	19 line	compound:prt
21	with	with	ADP	_	22 them	case
22	them	they	PRON	Case=Acc Number=Plur Person=3 PronType=Prs	19 line	obl
23	,	,	PUNCT	_	27 fall	punct
24	so	so	ADV	_	27 fall	advmod
25	nobody	nobody	PRON	Number=Sing PronType=Neg	27 fall	nsubj
26	can	can	AUX	VerbForm=Fin	27 fall	aux
27	fall	fall	VERB	VerbForm=Inf	12 open	conj
28	onto	onto	ADP	_	30 track	case
29	the	the	DET	Definite=Def PronType=Art	30 track	det
30	track	track	NOUN	Number=Sing	27 fall	obl
31	.	.	PUNCT	_	6 walls	punct

Pragmatics

No stored speech act for this sentence.

#	verb	tense, mood	who	what, whom	where	other	roles by
1	is a	present	screen doors	glass walls		along the platform	tree rules
2	open	present	doors				vn spatial_configuration-47.6-1 «NP V»: agent=Theme
3	line up	present	the train's doors			with walls = wall	vn fill-9.8-1 «NP V NP PP.theme»: agent=Agent with they=Theme
4	fall	can	nobody		the track		vn escape-51.1-1 «NP V PP.initial_location»: agent=Theme onto track=Initial_Location

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.

Licence: CC 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:20.

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): R7-rel-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.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/technology/21-trains-and-the-underground/20/