Constant is related to Time. Time is related to Weather. Weather is related to Winter. Winter is related to Outside. 
Laughter is related to Side. Rear is a type of Side. 
Constant <--RelatedTo--> Time <--RelatedTo--> Weather <--RelatedTo--> Winter <--RelatedTo--> Outside 
Laughter <--RelatedTo--> Side <--IsA-- Rear 