A magnetic field may be reversed.Logical formLearned from9 sentences. Soundtracks can be magnetic.Logical formLearned from9 sentences. A ticket can be magnetic.Logical formLearned from9 sentences. A catheter can be magnetic.Logical formLearned from9 sentences. A river can be magnetic.Logical formLearned from9 sentences. A stone can be magnetic.Logical formLearned from9 sentences. A gradient may pertain-to a magnetic field.Logical formLearned from9 sentences. A portion can be magnetic.Logical formLearned from9 sentences. A change can be in magnetic field.Logical formLearned from9 sentences. A stylus can be magnetic.Logical formLearned from9 sentences. Particles may interact with a magnetic field.Logical formLearned from9 sentences. A direction can be perpendicular to a magnetic field.Logical formLearned from9 sentences. A magnetic field can be detectable.Logical formLearned from9 sentences. Magnetic fields can be in an atmosphere.Logical formLearned from9 sentences. Magnetic fields may be produced.Logical formLearned from9 sentences.