---
title: An MRI scanner in hospital uses an extremely strong magnet and radio… — Compasses and the magnetic Earth · tree and pragmatics
description: An MRI scanner in hospital uses an extremely strong magnet and radio waves to make pictures of the inside of the body, so metal must stay outside the room. Who acts: MRI scanner, metal. A sentence of the lesson «Compasses and the magnetic Earth» of the physics course of Mova's primary school with it
---

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# Compasses and the magnetic Earth, sentence 15

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An MRI scanner in hospital uses an extremely strong magnet and radio waves to make pictures of the inside of the body, so metal must stay outside the room.

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**Who acts:** MRI scanner, metal · **What happens:** use, make, stay · **To what, where:** strong magnet, pictures, room

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This is a sentence of the lesson «Compasses and the magnetic Earth» of the physics 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 (MRI scanner, metal), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:030-compasses-and-the-magnetic-earth.lesson:15
# text = An MRI scanner in hospital uses an extremely strong magnet and radio waves to make pictures of the inside of the body, so metal must stay outside the room.
# source = school lesson (ours)
# course = physics
# lesson = 030-compasses-and-the-magnetic-earth.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	An	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	MRI	mri	NOUN	NN	Number=Sing	3	compound	_	_
3	scanner	scanner	NOUN	NN	Number=Sing	6	nsubj	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	hospital	hospital	NOUN	NN	Number=Sing	3	nmod	_	_
6	uses	use	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	an	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
8	extremely	extremely	ADV	RB	_	9	advmod	_	_
9	strong	strong	ADJ	JJ	Degree=Pos	10	amod	_	_
10	magnet	magnet	NOUN	NN	Number=Sing	6	obj	_	_
11	and	and	CCONJ	CC	_	13	cc	_	_
12	radio	radio	NOUN	NN	Number=Sing	13	compound	_	_
13	waves	wave	NOUN	NNS	Number=Plur	10	conj	_	_
14	to	to	PART	TO	_	15	mark	_	_
15	make	make	VERB	VB	VerbForm=Inf	6	advcl	_	_
16	pictures	picture	NOUN	NNS	Number=Plur	15	obj	_	_
17	of	of	ADP	IN	_	19	case	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	_	_
19	inside	inside	NOUN	NN	Number=Sing	16	nmod	_	_
20	of	of	ADP	IN	_	22	case	_	_
21	the	the	DET	DT	Definite=Def|PronType=Art	22	det	_	_
22	body	body	NOUN	NN	Number=Sing	19	nmod	_	_
23	,	,	PUNCT	,	_	27	punct	_	_
24	so	so	ADV	RB	_	27	advmod	_	_
25	metal	metal	NOUN	NN	Number=Sing	27	nsubj	_	_
26	must	must	AUX	MD	VerbForm=Fin	27	aux	_	_
27	stay	stay	VERB	VB	VerbForm=Inf	15	conj	_	_
28	outside	outside	ADP	IN	_	30	case	_	_
29	the	the	DET	DT	Definite=Def|PronType=Art	30	det	_	_
30	room	room	NOUN	NN	Number=Sing	27	obl	_	_
31	.	.	PUNCT	.	_	6	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 | **use** | present | a MRI scanner in hospital | a strong magnet and radio waves |  |  |  |  | vn eat-39.1 «NP V NP»: agent=Agent magnet=Patient |
| 2 | **make** | to-infinitive | a MRI scanner in hospital *not said here* | pictures of the inside of the body |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset picture=Product |
| 3 | **stay** | must | metal |  |  | the room |  |  | vn exist-47.1 «NP V PP.location»: agent=Theme outside room=Location |

<!-- .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:physics:030-compasses-and-the-magnetic-earth.lesson:15`.

**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/).

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