Poster is related to Sign. Sign is a type of Communication. Language can be used for Communication. Language is related to Korean. 
Cite is a synonym of Mention. Mention is related to Mean. 
Poster <--RelatedTo--> Sign --IsA--> Communication <--UsedFor-- Language <--RelatedTo--> Korean 
Cite <--Synonym--> Mention <--RelatedTo--> Mean 