What was the Attendance when Lincoln City was the Opponents with H/A of A?
CREATE TABLE "second_division" (
  "date" text,
  "opponents" text,
  "h_a" text,
  "result_f_a" text,
  "attendance" real
);
SELECT COUNT("attendance") FROM "second_division" WHERE "opponents"='lincoln city' AND "h_a"='a';