dogma is the sink of electrical matter for battery-operated machine
pinball_machine is electrical_device. resistor is two_terminal_electrical_device. milking_machine is mechanical_device. ice_machine is electric_refrigerator. milking_machine is externally_powered_device. milking_machine is machine. milking_machine is not electrical_device. baseball_bat is rigid_portable_object. milking_machine is electrical_device. paddle is rigid_portable_object.