Question: For the sanitarian who lives on 5000 N Wolcott Ave, how many establishments did he/she inspect in the May of 2011?
SQL: SELECT COUNT(T1.inspection_id) FROM inspection AS T1 INNER JOIN employee AS T2 ON T1.employee_id = T2.employee_id WHERE T2.address = '5000 N Wolcott Ave' AND T2.title = 'Sanitarian' AND strftime('%Y-%m', T1.inspection_date) = '2011-05'