Operation is related to Average. Average is a synonym of Expectation. Expectation is related to Plan. Host requires Plan. 
Green is related to Secondary. Secondary is etymologically related to Second. 
Operation <--RelatedTo--> Average <--Synonym--> Expectation <--RelatedTo--> Plan <--HasPrerequisite-- Host 
Green <--RelatedTo--> Secondary --EtymologicallyRelatedTo--> Second 