Among the students who filed for bankruptcy with an absence in school of no more than 6 months, how many students enlisted for the fire department?
absence of no more than 6 months refers to month < 6; department refers to organ; organ = 'fire_department';
SELECT COUNT(T1.name) FROM longest_absense_from_school AS T1 INNER JOIN filed_for_bankrupcy AS T2 ON T1.name = T2.name INNER JOIN enlist AS T3 ON T3.name = T2.name WHERE T3.organ = 'fire_department'