CREATE TABLE table_76996 ("Date" CLOB, "Opponents" CLOB, "H / A" CLOB, "Result F \\u2013 A" CLOB, "Attendance" FLOAT)

When did Manchester United play against Bristol City with an H/A of A?
SELECT "Date" FROM table_76996 WHERE "H / A" = 'a' AND "Opponents" = 'bristol city'
SELECT "Date" FROM "table_76996" WHERE "H / A" = 'a' AND "Opponents" = 'bristol city'