#superior_planet  any of the planets whose orbit lies outside the earth's orbit
  supertype:  planet  any of the celestial bodies (other than comets or satellites) that revolve around the sun in the solar system
  instance:  Red_Planet  Pluto
  subtype:  Jovian_planet__gas_giant__gasgiant  any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter)
     instance:  Jupiter  Neptune.Jovian_planet__neptune  Saturn  Uranus

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