Question: What river is the location of the 68th World Science Fiction Convention next to?
Related documents: [0]  [DOC] The Melbourne Convention and Exhibition Centre is the name given to two adjacent buildings next to the Yarra River in South Wharf, an inner-city suburb of Melbourne, Victoria, Australia. The venues are owned and operated by the Melbourne Convention and Exhibition Trust. [END] 
[1]  [DOC] The 68th World Science Fiction Convention (Worldcon), Aussiecon Four, was held 2–6 September 2010, in the Melbourne Convention and Exhibition Centre in Melbourne, Victoria, Australia, the location selected by the members of Denvention 3. [END] 
Answer: 
Yarra River
Yarra River