Army is related to Green. Green is etymologically related to Grow. Boom is a type of Grow. 
Wire is related to Snake. Twin is part of Snake. Twin is a type of Sibling. Sibling is related to Daughter. 
Army <--RelatedTo--> Green --EtymologicallyRelatedTo--> Grow <--IsA-- Boom 
Wire <--RelatedTo--> Snake <--PartOf-- Twin --IsA--> Sibling <--RelatedTo--> Daughter 