Where is the coordinate (41.66236555, -87.63470194) located? Give the name of the district.
coordinate (41.66236555, -87.63470194) refers to latitude = '41.66236555' AND longitude = '-87.63470194'; name of the district refers to district_name
SELECT T2.district_name FROM Crime AS T1 INNER JOIN District AS T2 ON T1.district_no = T2.district_no WHERE T1.longitude = '-87.63470194' AND T1.latitude = '41.66236555'