CREATE TABLE table_74710 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What day had over 51,319 attending week 4?
SELECT "Date" FROM table_74710 WHERE "Attendance" > '51,319' AND "Week" = '4'
SELECT "Date" FROM "table_74710" WHERE "Attendance" > '51,319' AND "Week" = '4'