Landscape is a type of Decorate. Landscape is related to Farm. Farm is related to Gathering. 
Theater is related to Scene. Scene is related to Event. Event is related to Appointment. Appointment is related to Meeting. 
Decorate <--IsA-- Landscape <--RelatedTo--> Farm <--RelatedTo--> Gathering 
Theater <--RelatedTo--> Scene <--RelatedTo--> Event <--RelatedTo--> Appointment <--RelatedTo--> Meeting 