A main belt can be asteroid with an orbital period of some days.Logical formLearned from1 204 sentences. A strike can be asteroid.Logical formLearned from74 sentences. Collisions can be asteroid.Logical formLearned from56 sentences. Discoveries can be asteroid.Logical formLearned from50 sentences. Millions can be asteroid.Logical formLearned from50 sentences. A discovery can be asteroid.Logical formLearned from44 sentences. Orbits can be asteroid.Logical formLearned from38 sentences. A surface can be asteroid.Logical formLearned from35 sentences. A colliding can be asteroid.Logical formLearned from26 sentences. Observations can be asteroid.Logical formLearned from22 sentences. A hit can be asteroid.Logical formLearned from21 sentences. A mass may pertain-to an asteroid belt.Logical formLearned from19 sentences. Fragments can be asteroid.Logical formLearned from19 sentences. A mission can be asteroid.Logical formLearned from19 sentences. An asteroid belt can be in a solar system.Logical formLearned from18 sentences.