District commander Robert A. Rubio was responsible for how many incidents in January, 2018?
in January 2018 refers to Substr(date, 1, 1) = '1' AND Substr(date, 5, 4) = '2018'
SELECT SUM(CASE WHEN SUBSTR(T2.date, 5, 4) = '2018' THEN 1 ELSE 0 END) FROM District AS T1 INNER JOIN Crime AS T2 ON T1.district_no = T2.district_no WHERE T1.commander = 'Robert A. Rubio' AND SUBSTR(T2.date, 1, 1) = '1'