Perceive is related to Listen. one thing you do when you Learning is Listen. Learning can cause/lead to Effectiveness. 
Invitation is related to Paper. Paper is related to Box. Box is related to Used. Used is related to Cake. 
Perceive <--RelatedTo--> Listen <--HasSubevent-- Learning --Causes--> Effectiveness 
Invitation <--RelatedTo--> Paper <--RelatedTo--> Box <--RelatedTo--> Used <--RelatedTo--> Cake 