the asteroid belt contains the largest concentration of asteroids in the solar system
asteroid is not asteroid. asteroid_belt is belt. main_asteroid_belt is asteroid_belt. asteroid_belt is not belt. asteroid is not rocky_planetary_body. asteroid is subplanetary_stellar_orbiter. asteroids is big_rocks_adrift_in_space. asteroid_ceres is larger_than_many_moons. asteroid is asteroid. main_asteroid_belt is not asteroid_belt.