Finger is related to Tap. Tap is related to Code. Code is related to Computer. Computer is made of Hardware. 
Offer is related to Donation. Donation is related to Donor. Donor is related to Blood. Blood is a different concept from Bone. 
Finger <--RelatedTo--> Tap <--RelatedTo--> Code <--RelatedTo--> Computer --MadeOf--> Hardware 
Offer <--RelatedTo--> Donation <--RelatedTo--> Donor <--RelatedTo--> Blood <--DistinctFrom--> Bone 