what's Smith Hall student capacity?
SELECT DISTINCT ( T1.student_capacity )  FROM dorm AS T1 JOIN has_amenity AS T2 ON T1.dormid   =   T2.dormid JOIN dorm_amenity AS T3 ON T2.amenid   =   T3.amenid WHERE T1.dorm_name  =  "Smith Hall"
Smith Hall student capacity refers to student_capacity from dorm table where dorm_name = 'Smith Hall';