---
title: Identify the principal function of air traffic control. — Airports, the black box, helicopters a… · tree and pragmatics
description: Identify the principal function of air traffic control. Exam question 2 of lesson 23 «Airports, the black box, helicopters and drones» of the technology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Exam question 2 · Airports, the black box, helicopters and drones

<!-- .ven lang=en -->
Identify the principal function of air traffic control.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you · **What happens:** identify · **To what, where:** principal function

<!-- .vabout -->
This is exam question 2 of lesson 23 «Airports, the black box, helicopters and drones» of the technology course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/technology/23-airports-black-box-helicopters-drones/#e2).

## The question {#question}

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:e2:1
# text = Identify the principal function of air traffic control.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	function	function	NOUN	NN	Number=Sing	1	obj	_	_
5	of	of	ADP	IN	_	8	case	_	_
6	air	air	NOUN	NN	Number=Sing	8	compound	_	_
7	traffic	traffic	NOUN	NN	Number=Sing	8	compound	_	_
8	control	control	NOUN	NN	Number=Sing	4	nmod	_	SpaceAfter=No
9	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal function of air traffic control |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent function=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.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The sale of tickets and the allocation of seats

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:e2:o1:1
# text = The sale of tickets and the allocation of seats
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	sale	sale	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	tickets	ticket	NOUN	NNS	Number=Plur	2	nmod	_	_
5	and	and	CCONJ	CC	_	7	cc	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	allocation	allocation	NOUN	NN	Number=Sing	4	conj	_	_
8	of	of	ADP	IN	_	9	case	_	_
9	seats	seat	NOUN	NNS	Number=Plur	7	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **allocate** |  |  | seats |  |  |  |  | nom allocation «possession transitive»: of=patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
The reporting of weather conditions to passengers exclusively

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:e2:o2:1
# text = The reporting of weather conditions to passengers exclusively
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	reporting	reporting	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	weather	weather	NOUN	NN	Number=Sing	5	compound	_	_
5	conditions	condition	NOUN	NNS	Number=Plur	2	nmod	_	_
6	to	to	ADP	IN	_	7	case	_	_
7	passengers	passenger	NOUN	NNS	Number=Plur	5	nmod	_	_
8	exclusively	exclusively	ADV	RB	_	7	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **report** |  |  | weather conditions to passengers |  |  |  |  | nom reporting «communication transitive»: of=patient |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
The maintenance of separation between aircraft by means of radar and radio, together with the issuing of clearances to depart and land

<!-- fold The tree, 22 words -->
```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:e2:o3:1
# text = The maintenance of separation between aircraft by means of radar and radio, together with the issuing of clearances to depart and land
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	maintenance	maintenance	NOUN	NN	Number=Sing	8	nsubj	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	separation	separation	NOUN	NN	Number=Sing	2	nmod	_	_
5	between	between	ADP	IN	_	6	case	_	_
6	aircraft	aircraft	NOUN	NN	Number=Sing	4	nmod	_	_
7	by	by	ADP	IN	_	8	case	_	_
8	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	of	of	ADP	IN	_	10	case	_	_
10	radar	radar	NOUN	NN	Number=Sing	8	obl	_	_
11	and	and	CCONJ	CC	_	12	cc	_	_
12	radio	radio	NOUN	NN	Number=Sing	10	conj	_	SpaceAfter=No
13	,	,	PUNCT	,	_	17	punct	_	_
14	together	together	ADV	RB	_	17	advmod	_	_
15	with	with	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	issuing	issuing	NOUN	NN	Number=Sing	8	parataxis	_	_
18	of	of	ADP	IN	_	19	case	_	_
19	clearances	clearance	NOUN	NNS	Number=Plur	17	nmod	_	_
20	to	to	PART	TO	_	21	mark	_	_
21	depart	depart	VERB	VB	VerbForm=Inf	17	acl	_	_
22	and	and	CCONJ	CC	_	23	cc	_	_
23	land	land	VERB	VB	VerbForm=Inf	21	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **mean** | present | the maintenance of separation between aircraft |  |  |  |  | of radar and radio | vn intend-61.2-1 «NP V S»: agent=Agent |
| 2 | **depart** | to-infinitive | the maintenance of separation between aircraft *not said here* |  |  |  |  |  | vn escape-51.1-1-1 «NP V»: agent=Theme |
| 3 | **land** | infinitive | the maintenance of separation between aircraft *not said here* |  |  |  |  |  | vn pocket-9.10-1 «NP V»: agent=Theme |
| 4 | **maintain** |  |  | separation between aircraft |  |  |  |  | nom maintenance «act transitive»: of=patient |
| 5 | **issue** |  |  | clearances |  |  |  |  | nom issuing «act transitive»: of=patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The refuelling of aircraft upon the apron

```conllu
# sent_id = question:technology:23-airports-black-box-helicopters-drones:e2:o4:1
# text = The refuelling of aircraft upon the apron
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	refuelling	refuelling	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	aircraft	aircraft	NOUN	NN	Number=Sing	2	nmod	_	_
5	upon	upon	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	apron	apron	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

<!-- div src -->

**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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- next →: [Airports, the black box, helicopters a…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/technology/23-airports-black-box-helicopters-drones/e3/)
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