Question: What's the attendance when the opponents are Cambridge United?
SQL: SELECT "Attendance" FROM "2-18258697-1" WHERE "Opponents" = 'Cambridge United';

Question: What's the average attendance when the opponents are Dundalk?
SQL: SELECT AVG("Attendance") FROM "2-18258697-1" WHERE "Opponents" = 'Dundalk';

Question: What's the total attendance for H/a of a and opponents of wolverhampton wanderers?
SQL: SELECT COUNT("Attendance") FROM "2-18258697-1" WHERE "H / A" = 'a' AND "Opponents" = 'wolverhampton wanderers';