How many more black female victims than white female victims were discovered?
black refers to race = 'B'; female refers to gender = 'F'; white refers to race = 'W'; result = subtract(count(victims where race = 'B'), count(victims where race = 'W')) where gender = 'F'
SELECT SUM(race = 'B') - SUM(race = 'W') FROM subjects WHERE gender = 'F'
database name:db_id shooting
Incidents table Incidents Cols: case number dtype text, date dtype date, location dtype text, subject statuses dtype text, subject weapon dtype text, subjects dtype text, subject_count dtype integer, officers dtype text, 
officers table officers Cols: case number dtype text, race dtype text, gender dtype text, last name dtype text, first name dtype text, full name dtype text, 
subjects table subjects Cols: case number dtype text, race dtype text, gender dtype text, last name dtype text, first name dtype text, full name dtype text, 
