Man is related to Demand. Demand is related to Economics. Economics is related to Trade. Trade is related to Commercial. 
Opening is similar to Beginning. Beginning is related to Sheep. Sheep is related to Baby. Baby is the opposite of Man. 
Man <--RelatedTo--> Demand <--RelatedTo--> Economics <--RelatedTo--> Trade <--RelatedTo--> Commercial 
Opening <--SimilarTo--> Beginning <--RelatedTo--> Sheep <--RelatedTo--> Baby <--Antonym--> Man 