CREATE TABLE table_64667 ("Year" FLOAT, "Tournament" TEXT, "Venue" TEXT, "Discipline" TEXT, "Result" TEXT, "Extra" TEXT)

What is the discipline for the summer Olympics in 2008?
SELECT "Discipline" FROM table_64667 WHERE "Tournament" = 'summer olympics' AND "Year" = '2008'
SELECT "Discipline" FROM "table_64667" WHERE "Tournament" = 'summer olympics' AND "Year" = '2008'