---
title: Scientists found that no single magic trick keeps a bike up; it is t… — Riding a bike: why it stays up · tree and pragmatics
description: Scientists found that no single magic trick keeps a bike up; it is the bike's shape and weight together. Who acts: Scientists, single magic trick, trick. A sentence of the lesson «Riding a bike: why it stays up» of the physics course of Mova's primary school with its dependency tree and the pragmati
---

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[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/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/) / [Riding a bike: why it stays up](https://md.mova.elamur.ai/free/en/corpora/school/physics/9-riding-a-bike/) / 8

# Riding a bike: why it stays up, sentence 8

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Scientists found that no single magic trick keeps a bike up; it is the bike's shape and weight together.

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**Who acts:** Scientists, single magic trick, trick · **What happens:** find, keep up, be · **To what, where:** bike, shape · **Speech:** someone speaks here

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This is a sentence of the lesson «Riding a bike: why it stays up» 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 (Scientists, single magic trick, trick), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:009-riding-a-bike.lesson:8
# text = Scientists found that no single magic trick keeps a bike up; it is the bike's shape and weight together.
# source = school lesson (ours)
# course = physics
# lesson = 009-riding-a-bike.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	Scientists	scientist	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	found	find	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
3	that	that	SCONJ	IN	_	8	mark	_	_
4	no	no	DET	DT	PronType=Neg	7	det	_	_
5	single	single	ADJ	JJ	Degree=Pos	7	amod	_	_
6	magic	magic	NOUN	NN	Number=Sing	7	compound	_	_
7	trick	trick	NOUN	NN	Number=Sing	8	nsubj	_	_
8	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	ccomp	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
10	bike	bike	NOUN	NN	Number=Sing	8	obj	_	_
11	up	up	ADP	RP	_	8	compound:prt	_	_
12	;	;	PUNCT	:	_	18	punct	_	_
13	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	18	nsubj	_	_
14	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	18	cop	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	bike	bike	NOUN	NN	Number=Sing	18	nmod:poss	_	_
17	's	's	PART	POS	_	16	case	_	_
18	shape	shape	NOUN	NN	Number=Sing	2	parataxis	_	_
19	and	and	CCONJ	CC	_	20	cc	_	_
20	weight	weight	NOUN	NN	Number=Sing	18	conj	_	_
21	together	together	ADV	RB	_	18	advmod	_	Agree=R5-strong|Haiku=2:advmod
22	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **find** | past | Scientists |  |  |  |  |  | vn declare-29.4-1-1 «NP V what S\_INF»: agent=Agent clause=Theme |
| 2 | **keep up** | present | no single magic trick | a bike |  |  |  |  | vn sustain-55.6 «NP V NP PP.instrument»: agent=Agent bike=Theme |
| 3 | **is a** | present | trick | the bike's shape and weight |  |  |  | together *property* | tree rules |

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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:009-riding-a-bike.lesson:8`.

**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: [Riding a bike: why it stays up, 7](https://md.mova.elamur.ai/free/en/corpora/school/physics/9-riding-a-bike/7/)
- next →: [Riding a bike: why it stays up, 9](https://md.mova.elamur.ai/free/en/corpora/school/physics/9-riding-a-bike/9/)
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