---
title: Trap two: big events rarely have only one cause. — Olympiad: cause and effect chains ★★★ · tree and pragmatics
description: Trap two: big events rarely have only one cause. Who acts: big events. A sentence of the lesson «Olympiad: cause and effect chains ★★★» of the history course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Olympiad: cause and effect chains ★★★, sentence 6

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Trap two: big events rarely have only one cause.

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**Who acts:** big events · **What happens:** have · **To what, where:** Trap

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This is a sentence of the lesson «Olympiad: cause and effect chains ★★★» of the history 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 (big events), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:history:086-olympiad-cause-and-effect-chains.lesson:6
# text = Trap two: big events rarely have only one cause.
# source = school lesson (ours)
# course = history
# lesson = 086-olympiad-cause-and-effect-chains.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
1	Trap	trap	NOUN	NN	Number=Sing	7	obl:unmarked	_	_
2	two	two	NUM	CD	NumForm=Word|NumType=Card	1	flat	_	_
3	:	:	PUNCT	:	_	5	punct	_	_
4	big	big	ADJ	JJ	Degree=Pos	5	amod	_	_
5	events	event	NOUN	NNS	Number=Plur	7	nsubj	_	_
6	rarely	rarely	ADV	RB	_	7	advmod	_	_
7	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	only	only	ADV	RB	_	9	advmod	_	_
9	one	one	NUM	CD	NumForm=Word|NumType=Card	10	nummod	_	_
10	cause	cause	NOUN	NN	Number=Sing	7	obj	_	_
11	.	.	PUNCT	.	_	1	punct	_	Agree=R6-punct-agree|Haiku=7:punct
```

## Pragmatics {#pragmatics}

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- form: command
- act: warn
- voice: narrator
- polarity: none
- teacher: changed act=warn

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | big events | Trap |  |  |  | rarely *property* | vn birth-28.2-1 «NP V NP»: agent=Agent cause=Patient |

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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:history:086-olympiad-cause-and-effect-chains.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. **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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- ← previous: [Olympiad: cause and effect chains ★★★, 5](https://md.mova.elamur.ai/free/en/corpora/school/history/86-olympiad-cause-and-effect-chains/5/)
- next →: [Olympiad: cause and effect chains ★★★, 7](https://md.mova.elamur.ai/free/en/corpora/school/history/86-olympiad-cause-and-effect-chains/7/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/history/86-olympiad-cause-and-effect-chains/)