How long is the orbital period for the planet that has a semimajor axis of 5.20 au?
CREATE TABLE "planets" (
  "planet" text,
  "planet_type" text,
  "semimajor_axis_au" text,
  "orbital_period" text,
  "radial_velocity_m_s" text,
  "detectable_by" text
);
SELECT "orbital_period" FROM "planets" WHERE "semimajor_axis_au"='5.20';