sentences: the moon is less bright than the sun
docs: sun is stronger_at_equator. sun is hotter_than_ocean. sun has more_mass_than_moon sunny_days is brighter_than_cloudy_days. summer has more_sunshine_than_winter everyone has seen_sun_and_moon moon is smaller_than_earth. sun is much_bigger_than_earth. sun is warmer_than_moon. sun is bright_star.