Question: Find the number of female students (with F sex) living in Smith Hall
SQL: SELECT count(*) FROM student AS T1 JOIN lives_in AS T2 ON T1.stuid  =  T2.stuid JOIN dorm AS T3 ON T3.dormid  =  T2.dormid WHERE T3.dorm_name  =  'Smith Hall' AND T1.sex  =  'F'