Which business had the lowest score for the unscheduled routine inspection on 2016/9/26? Give the name of the business.
the lowest score for unscheduled routine inspection refers to type = 'Routine - Unscheduled' where MIN(score); date = '2016-09-26';
SELECT T2.name FROM inspections AS T1 INNER JOIN businesses AS T2 ON T1.business_id = T2.business_id WHERE score = ( SELECT MIN(score) FROM inspections WHERE `date` = '2016-09-26' AND type = 'Routine - Unscheduled' ) AND T1.`date` = '2016-09-26' AND T1.type = 'Routine - Unscheduled'