Party is related to Fair. Fair is a synonym of Lovely. Lovely is etymologically related to Love. Love is related to Emotional. 
Event is related to History. History is related to Boring. 
Party <--RelatedTo--> Fair <--Synonym--> Lovely --EtymologicallyRelatedTo--> Love <--RelatedTo--> Emotional 
Event <--RelatedTo--> History <--RelatedTo--> Boring 