Introduction is the opposite of Conclusion. Conclusion is part of Address. Address is related to Street. Street is related to Straight. 
Signal is related to Communication. Advertising is a type of Communication. Advertising is a type of Media. Media is related to Paint. 
Introduction <--Antonym--> Conclusion --PartOf--> Address <--RelatedTo--> Street <--RelatedTo--> Straight 
Signal <--RelatedTo--> Communication <--IsA-- Advertising --IsA--> Media <--RelatedTo--> Paint 