---
title: The pop when you crack your knuckles comes from gas bubbles in the f… — Moving, swimming and sport · tree and pragmatics
description: The pop when you crack your knuckles comes from gas bubbles in the fluid of the joint; a doctor who cracked one hand's knuckles for over sixty years found no arthritis difference between his hands. Who acts: you, pop, doctor. A sentence of the lesson «Moving, swimming and sport» of the myths course 
---

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# Moving, swimming and sport, sentence 6

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The pop when you crack your knuckles comes from gas bubbles in the fluid of the joint; a doctor who cracked one hand's knuckles for over sixty years found no arthritis difference between his hands.

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**Who acts:** you, pop, doctor · **What happens:** crack, come, find · **To what, where:** knuckles, gas bubbles, arthritis difference

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This is a sentence of the lesson «Moving, swimming and sport» of the myths 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 (you, pop, doctor), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:myths:005-moving-swimming-and-sport.lesson:6
# text = The pop when you crack your knuckles comes from gas bubbles in the fluid of the joint; a doctor who cracked one hand's knuckles for over sixty years found no arthritis difference between his hands.
# source = school lesson (ours)
# course = myths
# lesson = 005-moving-swimming-and-sport.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): R2-punct-next ×1, R7-rel-agree ×2
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	pop	pop	NOUN	NN	Number=Sing	8	nsubj	_	_
3	when	when	ADV	WRB	PronType=Int	5	advmod	_	_
4	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	5	nsubj	_	_
5	crack	crack	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	2	acl	_	_
6	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
7	knuckles	knuckle	NOUN	NNS	Number=Plur	5	obj	_	_
8	comes	come	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	from	from	ADP	IN	_	11	case	_	_
10	gas	gas	NOUN	NN	Number=Sing	11	compound	_	_
11	bubbles	bubble	NOUN	NNS	Number=Plur	8	obl	_	_
12	in	in	ADP	IN	_	14	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	fluid	fluid	NOUN	NN	Number=Sing	11	nmod	_	_
15	of	of	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	joint	joint	NOUN	NN	Number=Sing	14	nmod	_	_
18	;	;	PUNCT	,	_	31	punct	_	Agree=R2-punct-next|Haiku=8:punct
19	a	a	DET	DT	Definite=Ind|PronType=Art	20	det	_	_
20	doctor	doctor	NOUN	NN	Number=Sing	31	nsubj	_	_
21	who	who	PRON	WP	PronType=Rel	22	nsubj	_	_
22	cracked	crack	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	20	acl:relcl	_	_
23	one	one	NUM	CD	NumForm=Word|NumType=Card	24	nummod	_	_
24	hand	hand	NOUN	NN	Number=Sing	26	nmod:poss	_	Agree=R7-rel-agree|Haiku=26:compound
25	's	's	PART	POS	_	24	case	_	_
26	knuckles	knuckle	NOUN	NNS	Number=Plur	22	obj	_	_
27	for	for	ADP	IN	_	30	case	_	_
28	over	over	ADV	RB	_	29	advmod	_	_
29	sixty	sixty	NUM	CD	NumForm=Word|NumType=Card	30	nummod	_	_
30	years	year	NOUN	NNS	Number=Plur	22	obl	_	_
31	found	find	VERB	VBD	Mood=Ind|Tense=Past|VerbForm=Fin	8	parataxis	_	Agree=R7-rel-agree|Haiku=8:conj
32	no	no	DET	DT	PronType=Neg	34	det	_	_
33	arthritis	arthritis	NOUN	NN	Number=Sing	34	compound	_	_
34	difference	difference	NOUN	NN	Number=Sing	31	obj	_	_
35	between	between	ADP	IN	_	37	case	_	_
36	his	his	PRON	PRP$	Case=Gen|Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	37	nmod:poss	_	_
37	hands	hand	NOUN	NNS	Number=Plur	34	nmod	_	_
38	.	.	PUNCT	.	_	8	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: narrate
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **crack** | present | you | your knuckles |  |  |  |  | vn sound\_emission-43.2 «PP.location V NP»: agent=Location knuckle=Theme |
| 2 | **come** | present | the pop |  |  | gas bubbles in the fluid of the joint |  |  | vn escape-51.1-1 «NP V PP.initial\_location»: agent=Theme from bubble=Initial\_Location |
| 3 | **crack** | past | a doctor | one hand's knuckles |  |  | year |  | vn sound\_emission-43.2 «PP.location V NP»: agent=Location knuckle=Theme |
| 4 | **find** | past | a doctor | no arthritis difference |  |  |  | between doctor's hands | vn discover-84 «NP V NP»: agent=Agent difference=Topic |

<!-- .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:myths:005-moving-swimming-and-sport.lesson:6`.

**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): R2-punct-next ×1, R7-rel-agree ×2. **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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