Bit is related to Half. Half is part of Whole. Complex is a type of Whole. Complex is a synonym of Involved. 
Sibling is related to Sister. Sister is related to House. 
Bit <--RelatedTo--> Half --PartOf--> Whole <--IsA-- Complex <--Synonym--> Involved 
Sibling <--RelatedTo--> Sister <--RelatedTo--> House 