phytoplanktons requires an electrical insulator
insulated_wire is electrical_wire. electrical_insulator is insulating_medium. humidifier is electrical_device. electrical_component is electrical_device. electrical_insulator is not insulating_medium. electrostatic_generator is not electrical_device. humidifier is not electrical_device. phytoplankton is not plant. phytoplankton is plant. electrostatic_generator is electrical_device.