Length is a type of Section. Section is related to Month. Month is related to Measure. 
Mine is related to Deep. Deep is related to Cotton. Cotton is related to Ear. Ear is related to Receiver. 
Length --IsA--> Section <--RelatedTo--> Month <--RelatedTo--> Measure 
Mine <--RelatedTo--> Deep <--RelatedTo--> Cotton <--RelatedTo--> Ear <--RelatedTo--> Receiver 