---
title: Male platypuses have venom spurs on their back legs for fights with… — Defences: venom in snakes, jellyfish, scorpions… · tree and pragmatics
description: Male platypuses have venom spurs on their back legs for fights with other males; the venom can cause terrible pain for weeks but has never been known to kill a person, and the platypus is one of very few venomous mammals. Who acts: Male platypuses, venom, platypus. A sentence of the lesson «Defences
---

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# Defences: venom in snakes, jellyfish, scorpions and the platypus, sentence 9

<!-- .ven lang=en -->
Male platypuses have venom spurs on their back legs for fights with other males; the venom can cause terrible pain for weeks but has never been known to kill a person, and the platypus is one of very few venomous mammals.

<!-- .vintro -->
**Who acts:** Male platypuses, venom, platypus · **What happens:** have, cause, not know, kill, be · **To what, where:** venom spurs, back legs, terrible pain, person, one

<!-- .vabout -->
This is a sentence of the lesson «Defences: venom in snakes, jellyfish, scorpions and the platypus» 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 (Male platypuses, venom, platypus), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:biology:246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus.lesson:9
# text = Male platypuses have venom spurs on their back legs for fights with other males; the venom can cause terrible pain for weeks but has never been known to kill a person, and the platypus is one of very few venomous mammals.
# source = school lesson (ours)
# course = biology
# lesson = 246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus.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 ×2, R7-rel-agree ×1
1	Male	male	ADJ	JJ	Degree=Pos	2	amod	_	_
2	platypuses	platypus	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	venom	venom	NOUN	NN	Number=Sing	5	compound	_	_
5	spurs	spur	NOUN	NNS	Number=Plur	3	obj	_	_
6	on	on	ADP	IN	_	9	case	_	_
7	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	9	nmod:poss	_	_
8	back	back	NOUN	NN	Number=Sing	9	compound	_	Agree=R7-rel-agree|Haiku=9:amod|HaikuPos=ADJ:JJ:Degree=Pos
9	legs	leg	NOUN	NNS	Number=Plur	5	nmod	_	_
10	for	for	ADP	IN	_	11	case	_	_
11	fights	fight	NOUN	NNS	Number=Plur	3	obl	_	Agree=R5-strong|Haiku=9:nmod
12	with	with	ADP	IN	_	14	case	_	_
13	other	other	ADJ	JJ	Degree=Pos	14	amod	_	_
14	males	male	NOUN	NNS	Number=Plur	11	nmod	_	_
15	;	;	PUNCT	,	_	19	punct	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	venom	venom	NOUN	NN	Number=Sing	19	nsubj	_	_
18	can	can	AUX	MD	VerbForm=Fin	19	aux	_	_
19	cause	cause	VERB	VB	VerbForm=Inf	3	parataxis	_	_
20	terrible	terrible	ADJ	JJ	Degree=Pos	21	amod	_	_
21	pain	pain	NOUN	NN	Number=Sing	19	obj	_	_
22	for	for	ADP	IN	_	23	case	_	_
23	weeks	week	NOUN	NNS	Number=Plur	19	obl	_	Agree=R5-strong|Haiku=21:nmod
24	but	but	CCONJ	CC	_	28	cc	_	_
25	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	28	aux	_	_
26	never	never	ADV	RB	PronType=Neg	28	advmod	_	_
27	been	be	AUX	VBN	Tense=Past|VerbForm=Part	28	aux:pass	_	_
28	known	know	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	19	conj	_	_
29	to	to	PART	TO	_	30	mark	_	_
30	kill	kill	VERB	VB	VerbForm=Inf	28	xcomp	_	_
31	a	a	DET	DT	Definite=Ind|PronType=Art	32	det	_	_
32	person	person	NOUN	NN	Number=Sing	30	obj	_	_
33	,	,	PUNCT	,	_	38	punct	_	_
34	and	and	CCONJ	CC	_	38	cc	_	_
35	the	the	DET	DT	Definite=Def|PronType=Art	36	det	_	_
36	platypus	platypus	NOUN	NN	Number=Sing	38	nsubj	_	_
37	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	38	cop	_	_
38	one	one	NUM	CD	NumForm=Word|NumType=Card	19	conj	_	_
39	of	of	ADP	IN	_	43	case	_	_
40	very	very	ADV	RB	_	41	advmod	_	_
41	few	few	ADJ	JJ	Degree=Pos	43	amod	_	_
42	venomous	venomous	ADJ	JJ	Degree=Pos	43	amod	_	_
43	mammals	mammal	NOUN	NNS	Number=Plur	38	nmod	_	_
44	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: changed polarity=none

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Male platypuses | venom spurs |  | platypuses's back legs |  | for fights with other males | vn birth-28.2-1 «NP V NP»: agent=Agent spur=Patient |
| 2 | **cause** | can | the venom | terrible pain |  |  | week |  | vn engender-27.1-1 «NP V NP»: agent=Precondition pain=Patient |
| 3 | **not** **know** | present · perfect · passive | the venom *not said here* |  |  |  |  |  | vn comprehend-87.2-1-1-1 «NP V how S\_INF»: clause=Stimulus |
| 4 | **kill** | to-infinitive | the venom *not said here* | a person |  |  |  |  | vn remove-10.1 «NP V NP»: agent=Agent person=Theme |
| 5 | **is a** | present | the platypus | one |  |  |  | of few venomous mammals | tree rules |

<!-- .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:biology:246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus.lesson:9`.

**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 ×2, 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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