Compete requires Improve. the first thing you do when you Compete is Prepare. Perform requires Prepare. Incentive would make you want to Perform. 
Length is related to Stick. Stick is related to Poke. Poke is a synonym of Purse. 
Improve <--HasPrerequisite-- Compete --HasFirstSubevent--> Prepare <--HasPrerequisite-- Perform <--CausesDesire-- Incentive 
Length <--RelatedTo--> Stick <--RelatedTo--> Poke <--Synonym--> Purse 