CREATE TABLE table_50908 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" TEXT, "Location" TEXT)

Where was the location where justin robbins fought against billy kidd?
SELECT "Location" FROM table_50908 WHERE "Opponent" = 'billy kidd'
SELECT "Location" FROM "table_50908" WHERE "Opponent" = 'billy kidd'