Question: For the event which happened at 23:55:16 on 2016/5/7, in the location coordinate(113, 28), on what device did it happen? Give the name of the device model.
SQL: SELECT T1.device_model FROM phone_brand_device_model2 AS T1 INNER JOIN events AS T2 ON T1.device_id = T2.event_id WHERE T2.longitude = '113' AND T2.latitude = '28' AND T2.timestamp = '2016-05-07 23:55:16'