Pipe is a type of Decorate. Flag is a type of Decorate. 
Plea is part of Trial. Plea is related to Court. Court is related to Area. Area is related to World. 
Pipe --IsA--> Decorate <--IsA-- Flag 
Trial <--PartOf-- Plea <--RelatedTo--> Court <--RelatedTo--> Area <--RelatedTo--> World 