Which cities in the Los Angeles Unified School District has bought supplies from Quill.com?
cities refer to school_city; Los Angeles Unified School District refer to school_district = 'Los Angeles Unified School District'; supplies refer to project_resource_type; Quill.com refer to vendor_name
SELECT T2.school_city FROM resources AS T1 INNER JOIN projects AS T2 ON T1.projectid = T2.projectid WHERE T2.school_district = 'Los Angeles Unif Sch Dist' AND T1.vendor_name = 'Quill.com'