What is the precise location of the establishment with the highest number of failed inspections?
precise location refers to latitude, longitude; the highest number of failed inspections refers to max(count(results where results = 'Fail'))
SELECT T1.latitude, T1.longitude FROM establishment AS T1 INNER JOIN ( SELECT license_no FROM inspection WHERE results = 'Fail' GROUP BY license_no ORDER BY COUNT(results) DESC LIMIT 1 ) AS T2 ON T1.license_no = T2.license_no