CREATE TABLE table_6805 ("Date" TEXT, "Opponent" TEXT, "Venue" TEXT, "Result" TEXT, "Attendance" FLOAT)

What was the Attendance on 31 January 1987?
SELECT COUNT("Attendance") FROM table_6805 WHERE "Date" = '31 january 1987'
SELECT COUNT("Attendance") FROM "table_6805" WHERE "Date" = '31 january 1987'