Table schema:
CREATE TABLE table_name_5 (run_3 INTEGER, run_1 VARCHAR, run_2 VARCHAR)

Question: What is the run 3 of the athlete with a run 1 more than 53.75 and a run 2 less than 52.91?
SQL: SELECT SUM(run_3) FROM table_name_5 WHERE run_1 > 53.75 AND run_2 < 52.91