---
title: Many famous "facts" are myths that nobody checked: carrots for night… — "How do you know?" · tree and pragmatics
description: Many famous "facts" are myths that nobody checked: carrots for night vision, the 10% brain, gum staying seven years, ostriches burying their heads. Who acts: Many famous facts, nobody, gum, ostriches. A sentence of the lesson «"How do you know?"» of the world course of Mova's primary school with its
---

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# "How do you know?", sentence 6

<!-- .ven lang=en -->
Many famous "facts" are myths that nobody checked: carrots for night vision, the 10% brain, gum staying seven years, ostriches burying their heads.

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**Who acts:** Many famous facts, nobody, gum, ostriches · **What happens:** be, check, stay, bury · **To what, where:** myths, heads

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This is a sentence of the lesson «"How do you know?"» of the world 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 (Many famous facts, nobody, gum, ostriches), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:186-how-do-you-know.lesson:6
# text = Many famous "facts" are myths that nobody checked: carrots for night vision, the 10% brain, gum staying seven years, ostriches burying their heads.
# source = school lesson (ours)
# course = world
# lesson = 186-how-do-you-know.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): R6-punct-agree ×1, R7-rel-agree ×1
1	Many	many	ADJ	JJ	Degree=Pos	4	amod	_	_
2	famous	famous	ADJ	JJ	Degree=Pos	4	amod	_	_
3	"	"	PUNCT	``	_	4	punct	_	_
4	facts	fact	NOUN	NNS	Number=Plur	7	nsubj	_	_
5	"	"	PUNCT	''	_	4	punct	_	_
6	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
7	myths	myth	NOUN	NNS	Number=Plur	0	root	_	_
8	that	that	PRON	WDT	PronType=Rel	10	obj	_	_
9	nobody	nobody	PRON	NN	Number=Sing|PronType=Neg	10	nsubj	_	_
10	checked	check	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	7	acl:relcl	_	_
11	:	:	PUNCT	:	_	7	punct	_	_
12	carrots	carrot	NOUN	NNS	Number=Plur	7	appos	_	_
13	for	for	ADP	IN	_	15	case	_	_
14	night	night	NOUN	NN	Number=Sing	15	compound	_	_
15	vision	vision	NOUN	NN	Number=Sing	12	nmod	_	_
16	,	,	PUNCT	,	_	20	punct	_	Agree=R6-punct-agree|Haiku=10:punct
17	the	the	DET	DT	Definite=Def|PronType=Art	20	det	_	_
18	10	10	NUM	CD	NumForm=Digit|NumType=Card	19	nummod	_	_
19	%	%	SYM	NN	Number=Sing	20	compound	_	_
20	brain	brain	NOUN	NN	Number=Sing	12	conj	_	_
21	,	,	PUNCT	,	_	22	punct	_	_
22	gum	gum	NOUN	NN	Number=Sing	20	conj	_	_
23	staying	stay	VERB	VBG	VerbForm=Ger	22	acl	_	_
24	seven	seven	NUM	CD	NumForm=Word|NumType=Card	25	nummod	_	_
25	years	year	NOUN	NNS	Number=Plur	23	obl	_	Agree=R7-rel-agree|Haiku=23:obj
26	,	,	PUNCT	,	_	27	punct	_	_
27	ostriches	ostrich	NOUN	NNS	Number=Plur	12	conj	_	_
28	burying	bury	VERB	VBG	VerbForm=Ger	27	acl	_	_
29	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	30	nmod:poss	_	_
30	heads	head	NOUN	NNS	Number=Plur	28	obj	_	_
31	.	.	PUNCT	.	_	7	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 | **is a** | present | Many famous facts | myths |  |  |  |  | tree rules |
| 2 | **check** | past | nobody | myths |  |  |  |  | vn assessment-34.1 «NP V NP»: agent=Agent that=Theme |
| 3 | **stay** | gerund | gum *not said here* |  |  |  | year |  | vn exist-47.1 «NP V»: agent=Theme |
| 4 | **bury** | gerund | ostriches *not said here* | facts's heads |  |  |  |  | vn put-9.1-1 «NP V NP»: agent=Agent head=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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**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:world:186-how-do-you-know.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): R6-punct-agree ×1, R7-rel-agree ×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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