Table schema:
CREATE TABLE table_name_68 (total_score VARCHAR, location VARCHAR, year VARCHAR, to_par_ VARCHAR, a_ VARCHAR)

Question: What is the total score for a location of san francisco, california, and a year after 1987, and a to pa [a] of +1?
SQL: SELECT total_score FROM table_name_68 WHERE location = "san francisco, california" AND year > 1987 AND to_par_[a_] = "+1"