Detail is a type of Assign. Detail is related to Information. 
Crowded is related to Party. you are likely to find Party in/at/on Boat. you are likely to find Human in/at/on Boat. Hero is a type of Human. 
Assign <--IsA-- Detail <--RelatedTo--> Information 
Crowded <--RelatedTo--> Party --AtLocation--> Boat <--AtLocation-- Human <--IsA-- Hero 