Task: Text to Code
Input (English): SQL: SELECT Avg ( T1.duration ) FROM trip AS T1 JOIN weather AS T2 WHERE T2.min_temperature_f > 50
Feedback: Find the date whose average max humidity greater than 50 and average max visibility miles greater than 8.
Output (English): SELECT COUNT(*) FROM weather WHERE mean_humidity  >  50 AND mean_visibility_miles  >  8