Find the zip code in which the average mean visibility is lower than 10.
SELECT zip_code FROM weather GROUP BY zip_code HAVING avg(mean_visibility_miles)  <  10
SELECT zip_code FROM weather GROUP BY zip_code HAVING avg(mean_visibility_miles)  <  10
[{'zip_code': 94041}, {'zip_code': 94063}, {'zip_code': 94107}, {'zip_code': 95113}]