Trim is related to Fit. Fit is related to Alter. 
Opportunity would make you want to Surprise. Event can Surprise. Migration is a type of Event. Immigration is a type of Migration. 
Trim <--RelatedTo--> Fit <--RelatedTo--> Alter 
Opportunity --CausesDesire--> Surprise <--CapableOf-- Event <--IsA-- Migration <--IsA-- Immigration 