CREATE TABLE table_46928 ("Res." CLOB, "Record" CLOB, "Opponent" CLOB, "Method" CLOB, "Event" CLOB, "Round" FLOAT, "Time" CLOB, "Location" CLOB)

What is the round for the ufc on fox: velasquez vs. dos santos event?
SELECT AVG("Round") FROM table_46928 WHERE "Event" = 'ufc on fox: velasquez vs. dos santos'
SELECT AVG("Round") FROM "table_46928" WHERE "Event" = 'ufc on fox: velasquez vs. dos santos'