Discourse is a synonym of Lecture. Lecture is related to College. College is related to History. Historical is derived from History. 
Tournament is a type of Contest. Tournament is related to Open. Open is related to Range. Range is a type of Arrange. 
Discourse <--Synonym--> Lecture <--RelatedTo--> College <--RelatedTo--> History <--DerivedFrom-- Historical 
Contest <--IsA-- Tournament <--RelatedTo--> Open <--RelatedTo--> Range --IsA--> Arrange 