Person is related to Angel. Angel is related to Flying. Flying is related to Wing. Wing can be used for Flight. 
Comfortable is derived from Comfort. Comfortable is related to Seat. Seat is related to Plane. 
Person <--RelatedTo--> Angel <--RelatedTo--> Flying <--RelatedTo--> Wing --UsedFor--> Flight 
Comfort <--DerivedFrom-- Comfortable <--RelatedTo--> Seat <--RelatedTo--> Plane 