Inform is a type of Communicate. Announce is a type of Inform. 
Cigarette can be used for Burning. Burning is similar to Important. Important is related to Significance. Significance is a synonym of Implication. 
Communicate <--IsA-- Inform <--IsA-- Announce 
Cigarette --UsedFor--> Burning <--SimilarTo--> Important <--RelatedTo--> Significance <--Synonym--> Implication 