---
title: A snake smells with its forked tongue, touching scent to a special o… — The reptile house: snakes · tree and pragmatics
description: A snake smells with its forked tongue, touching scent to a special organ in the roof of its mouth; the tongue is harmless. Who acts: snake, forked tongue, tongue. A sentence of the lesson «The reptile house: snakes» of the biology course of Mova's primary school with its dependency tree and the prag
---

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# The reptile house: snakes, sentence 5

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A snake smells with its forked tongue, touching scent to a special organ in the roof of its mouth; the tongue is harmless.

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**Who acts:** snake, forked tongue, tongue · **What happens:** smell, fork, touch, be · **To what, where:** scent

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This is a sentence of the lesson «The reptile house: snakes» of the biology 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 (snake, forked tongue, tongue), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:087-reptile-house-snakes.lesson:5
# text = A snake smells with its forked tongue, touching scent to a special organ in the roof of its mouth; the tongue is harmless.
# source = school lesson (ours)
# course = biology
# lesson = 087-reptile-house-snakes.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): R7-rel-agree ×1, R8-pos-agree ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	snake	snake	NOUN	NN	Number=Sing	3	nsubj	_	_
3	smells	smell	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	with	with	ADP	IN	_	7	case	_	_
5	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
6	forked	fork	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	amod	_	Agree=R8-pos-agree|Haiku=7:amod|HaikuPos=ADJ:JJ:Degree=Pos
7	tongue	tongue	NOUN	NN	Number=Sing	3	obl	_	_
8	,	,	PUNCT	,	_	9	punct	_	_
9	touching	touch	VERB	VBG	VerbForm=Ger	7	acl	_	_
10	scent	scent	NOUN	NN	Number=Sing	9	obj	_	_
11	to	to	ADP	IN	_	14	case	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
13	special	special	ADJ	JJ	Degree=Pos	14	amod	_	_
14	organ	organ	NOUN	NN	Number=Sing	9	obl	_	_
15	in	in	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	roof	roof	NOUN	NN	Number=Sing	14	nmod	_	_
18	of	of	ADP	IN	_	20	case	_	_
19	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	20	nmod:poss	_	_
20	mouth	mouth	NOUN	NN	Number=Sing	17	nmod	_	_
21	;	;	PUNCT	:	_	25	punct	_	_
22	the	the	DET	DT	Definite=Def|PronType=Art	23	det	_	_
23	tongue	tongue	NOUN	NN	Number=Sing	25	nsubj	_	_
24	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	25	cop	_	_
25	harmless	harmless	ADJ	JJ	Degree=Pos	3	parataxis	_	Agree=R7-rel-agree|Haiku=3:conj
26	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: changed act=assert

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **smell** | present | a snake |  |  |  |  | with python's forked tongue | vn smell\_emission-43.3 «NP.location V»: agent=Location |
| 2 | **fork** | participle |  |  |  |  |  |  | vn pocket-9.10 «NP V NP.theme»: agent=Agent |
| 3 | **touch** | gerund | python's forked tongue *not said here* | scent |  |  |  | to a special organ in the roof of python's mouth | vn contiguous\_location-47.8-1 «NP V NP»: agent=Theme scent=Co-Theme |
| 4 | **is** | present | the tongue |  |  |  |  | harmless *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:biology:087-reptile-house-snakes.lesson:5`.

**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): R7-rel-agree ×1, R8-pos-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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