you are likely to find Party in/at/on Boat. Boat is related to Shit. you are likely to find Shit in/at/on Lawn. 
Reach is related to Motion. Motion is a type of Subject. Subject is related to Book. 
Party --AtLocation--> Boat <--RelatedTo--> Shit --AtLocation--> Lawn 
Reach <--RelatedTo--> Motion --IsA--> Subject <--RelatedTo--> Book 