---
title: Security checks at airports keep flights safe. — Walking, seat belts, buses, airports, bike helme… · tree and pragmatics
description: Security checks at airports keep flights safe. Who acts: Security checks. A sentence of the lesson «Walking, seat belts, buses, airports, bike helmets, queues and tipping» of the everyday course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/everyday/331-walking-seat-belts-buses-airports-bikes-and-tipping/12/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Everyday](https://md.mova.elamur.ai/free/en/corpora/school/everyday/) / [Walking, seat belts, buses, airports,…](https://md.mova.elamur.ai/free/en/corpora/school/everyday/331-walking-seat-belts-buses-airports-bikes-and-tipping/) / 12

# Walking, seat belts, buses, airports, bike helmets, queues and tipping, sentence 12

<!-- .ven lang=en -->
Security checks at airports keep flights safe.

<!-- .vintro -->
**Who acts:** Security checks · **What happens:** keep · **To what, where:** flights

<!-- .vabout -->
This is a sentence of the lesson «Walking, seat belts, buses, airports, bike helmets, queues and tipping» of the everyday 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 (Security checks), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:everyday:331-walking-seat-belts-buses-airports-bikes-and-tipping.lesson:12
# text = Security checks at airports keep flights safe.
# source = school lesson (ours)
# course = everyday
# lesson = 331-walking-seat-belts-buses-airports-bikes-and-tipping.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): no change
1	Security	security	NOUN	NN	Number=Sing	2	compound	_	_
2	checks	check	NOUN	NNS	Number=Plur	5	nsubj	_	_
3	at	at	ADP	IN	_	4	case	_	_
4	airports	airport	NOUN	NNS	Number=Plur	2	nmod	_	_
5	keep	keep	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	flights	flight	NOUN	NNS	Number=Plur	5	obj	_	_
7	safe	safe	ADJ	JJ	Degree=Pos	5	xcomp	_	_
8	.	.	PUNCT	.	_	5	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 | **keep** | present | Security checks at airports | flights |  |  |  | safe *property* | vn keep-15.2 «NP V NP»: agent=Agent flight=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.

<!-- div src -->

**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:everyday:331-walking-seat-belts-buses-airports-bikes-and-tipping.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): no change. **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/).

<!-- /div -->

<!-- pn -->
- ← previous: [Walking, seat belts, buses, airports,…, 11](https://md.mova.elamur.ai/free/en/corpora/school/everyday/331-walking-seat-belts-buses-airports-bikes-and-tipping/11/)
- next →: [Walking, seat belts, buses, airports,…, 13](https://md.mova.elamur.ai/free/en/corpora/school/everyday/331-walking-seat-belts-buses-airports-bikes-and-tipping/13/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/everyday/331-walking-seat-belts-buses-airports-bikes-and-tipping/)