Lawsuit is derived from Law. Law is related to Court. you are likely to find Court in/at/on Palace. Palace is related to Heaven. 
Perform requires Act. Implementation is a type of Act. 
Lawsuit --DerivedFrom--> Law <--RelatedTo--> Court --AtLocation--> Palace <--RelatedTo--> Heaven 
Perform --HasPrerequisite--> Act <--IsA-- Implementation 