---
title: But necessity is the mother of invention: Hans threw off his fur coa… — The Violet Fairy Book · tree and pragmatics
description: But necessity is the mother of invention: Hans threw off his fur coat, gathered up the silver ashes so carefully in it that none remained behind, laid the gold sticks on top, and tied up the bag thus made with his girdle, so that nothing should fall out. Who acts: necessity, Hans, none, gold. A sent
---

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# The Violet Fairy Book, The Underground Workers, sentence 82

<!-- .ven lang=en -->
But necessity is the mother of invention: Hans threw off his fur coat, gathered up the silver ashes so carefully in it that none remained behind, laid the gold sticks on top, and tied up the bag thus made with his girdle, so that nothing should fall out.

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**Who acts:** necessity, Hans, none, gold, nothing · **What happens:** be, throw off, gather up, remain, lay, stick · **To what, where:** mother, fur coat, necessity, silver ashes, top, bag

<!-- .vabout -->
This is a sentence of «The Violet Fairy Book» by Andrew Lang, The Underground Workers. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (necessity, Hans, none, gold), what happens, when and where, as Mova's frames read it from the tree.

<!-- .note-en -->
**Parsed by Mova, not checked by a teacher.** This tree is Mova's own parse (the `en` model, on the CPU, when the site is built); it may be wrong.

## The tree {#tree}

```conllu
# sent_id = book:pg641:25:82
# text = But necessity is the mother of invention: Hans threw off his fur coat, gathered up the silver ashes so carefully in it that none remained behind, laid the gold sticks on top, and tied up the bag thus made with his girdle, so that nothing should fall out.
1	But	but	CCONJ	CC	_	2	cc	_	_
2	necessity	necessity	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	mother	mother	NOUN	NN	Number=Sing	0	root	_	_
6	of	of	ADP	IN	_	7	case	_	_
7	invention	invention	NOUN	NN	Number=Sing	5	nmod	_	SpaceAfter=No
8	:	:	PUNCT	:	_	10	punct	_	_
9	Hans	Hans	PROPN	NNP	Number=Sing	10	nsubj	_	_
10	threw	throw	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	5	parataxis	_	_
11	off	off	ADP	RP	_	10	compound:prt	_	_
12	his	his	PRON	PRP$	Case=Gen|Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
13	fur	fur	NOUN	NN	Number=Sing	14	compound	_	_
14	coat	coat	NOUN	NN	Number=Sing	10	obj	_	SpaceAfter=No
15	,	,	PUNCT	,	_	16	punct	_	_
16	gathered	gather	VERB	VBD	Mood=Ind|Tense=Past|VerbForm=Fin	10	conj	_	_
17	up	up	ADP	RP	_	16	compound:prt	_	_
18	the	the	DET	DT	Definite=Def|PronType=Art	20	det	_	_
19	silver	silver	NOUN	NN	Number=Sing	20	compound	_	_
20	ashes	ash	NOUN	NNS	Number=Plur	16	obj	_	_
21	so	so	ADV	RB	_	22	advmod	_	_
22	carefully	carefully	ADV	RB	_	10	advmod	_	_
23	in	in	ADP	IN	_	24	case	_	_
24	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	10	obl	_	_
25	that	that	SCONJ	IN	_	27	mark	_	_
26	none	none	PRON	NN	PronType=Neg	27	nsubj	_	_
27	remained	remain	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	10	advcl	_	_
28	behind	behind	ADV	RB	_	27	advmod	_	SpaceAfter=No
29	,	,	PUNCT	,	_	30	punct	_	_
30	laid	lay	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	10	conj	_	_
31	the	the	DET	DT	Definite=Def|PronType=Art	32	det	_	_
32	gold	gold	NOUN	NN	Number=Sing	33	nsubj	_	_
33	sticks	stick	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	30	ccomp	_	_
34	on	on	ADP	IN	_	35	case	_	_
35	top	top	NOUN	NN	Number=Sing	33	obl	_	SpaceAfter=No
36	,	,	PUNCT	,	_	38	punct	_	_
37	and	and	CCONJ	CC	_	38	cc	_	_
38	tied	tie	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	10	conj	_	_
39	up	up	ADP	RP	_	38	compound:prt	_	_
40	the	the	DET	DT	Definite=Def|PronType=Art	41	det	_	_
41	bag	bag	NOUN	NN	Number=Sing	38	obj	_	_
42	thus	thus	ADV	RB	_	43	advmod	_	_
43	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	41	acl	_	_
44	with	with	ADP	IN	_	46	case	_	_
45	his	his	PRON	PRP$	Case=Gen|Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	46	nmod:poss	_	_
46	girdle	girdle	NOUN	NN	Number=Sing	43	obl	_	SpaceAfter=No
47	,	,	PUNCT	,	_	52	punct	_	_
48	so	so	SCONJ	IN	ExtPos=SCONJ	52	mark	_	_
49	that	that	SCONJ	IN	_	48	fixed	_	_
50	nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	52	nsubj	_	_
51	should	should	AUX	MD	VerbForm=Fin	52	aux	_	_
52	fall	fall	VERB	VB	VerbForm=Inf	38	advcl	_	_
53	out	out	ADP	RP	_	52	compound:prt	_	SpaceAfter=No
54	.	.	PUNCT	.	_	5	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | necessity | the mother |  |  |  | of invention | tree rules |
| 2 | **throw off** | past | Hans | friend's fur coat |  | necessity |  | carefully *property* | vn throw-17.1-1-1 «NP V NP PP.destinations»: agent=Agent coat=Theme in it=Destination |
| 3 | **gather up** | past | Hans *not said here* | the silver ashes |  |  |  |  | vn deduce-97.2 «NP V NP»: agent=Agent ash=Theme |
| 4 | **remain** | participle | none |  |  |  |  | behind *property* | vn exist-47.1 «NP V»: agent=Theme |
| 5 | **lay** | past | Hans *not said here* |  |  |  |  |  | tree rules |
| 6 | **stick** | present | the gold |  |  | top |  |  | vn spray-9.7-1 «NP V PP.destination»: agent=Theme on top=Destination |
| 7 | **tie up** | participle | Hans *not said here* | the bag |  |  |  |  | vn mix-22.1-2 «NP V NP»: agent=Agent bag=Patient |
| 8 | **make** | participle |  | the bag *not said here* |  |  |  | with friend's girdle; thus *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset |
| 9 | **fall out** | should | nothing |  |  |  |  |  | vn occur-48.3 «NP V»: agent=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.

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**Text:** «The Violet Fairy Book» by Andrew Lang, Project Gutenberg book 641 (public domain in the USA). **Tree:** Mova's own parse, Elamur Cosmic License. **Frames:** Mova's frames reader (`prag`), the chapter read in order.

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