Which type of weapon was used to attack the victim in the record number 031347-2015? What is the victim's race and gender?
type of weapon refers to subject_weapon; record number 031347-2015 refers to case_number = '031347-2015'
SELECT T1.subject_weapon, T2.race, T2.gender FROM incidents AS T1 INNER JOIN subjects AS T2 ON T1.case_number = T2.case_number WHERE T1.case_number = '031347-2015'