Oil is related to Material. Material is a synonym of Matter. Matter is related to Carbon. Carbon is related to Organic. 
Platform can be used for Speak. Platform is related to Bar. Bar is related to Flat. Flat is a type of House. 
Oil <--RelatedTo--> Material <--Synonym--> Matter <--RelatedTo--> Carbon <--RelatedTo--> Organic 
Speak <--UsedFor-- Platform <--RelatedTo--> Bar <--RelatedTo--> Flat --IsA--> House 