Table: railway_vehicles
Columns: class
wheel_arrangement
railway
number_at_doncaster
number_at_pyewipe
number_at_march

Question: Name the number of wheel arrangement when class is d14
SQL: SELECT COUNT("wheel_arrangement") FROM railway_vehicles WHERE "class" = 'D14'

Question: Name the most number of pyewipe
SQL: SELECT MAX("number_at_pyewipe") FROM railway_vehicles

Question: Name the number at march when class is j66
SQL: SELECT "number_at_march" FROM railway_vehicles WHERE "class" = 'J66'

Question: Name the railway when class is j19
SQL: SELECT "railway" FROM railway_vehicles WHERE "class" = 'J19'

Question: Name the railway when class is j15
SQL: SELECT "railway" FROM railway_vehicles WHERE "class" = 'J15'