CREATE TABLE table_33016 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

For the 1967 Cleveland Browns season what is the total number of times they played the Minnesota Vikings and had an atttendance smaller than 68,431?
SELECT COUNT("Week") FROM table_33016 WHERE "Opponent" = 'minnesota vikings' AND "Attendance" < '68,431'
SELECT COUNT("Week") FROM "table_33016" WHERE "Attendance" < '68,431' AND "Opponent" = 'minnesota vikings'