Rank is related to Class. Class is related to Scholar. Scholar is related to Degree. 
Tank is a type of Process. Tank is related to Gun. Gun is related to Machine. Machine is related to Press. 
Rank <--RelatedTo--> Class <--RelatedTo--> Scholar <--RelatedTo--> Degree 
Process <--IsA-- Tank <--RelatedTo--> Gun <--RelatedTo--> Machine <--RelatedTo--> Press 