A male may take a track.Logical formLearned from15 sentences. A section can be constituted-of-or-filled-with tracks.Logical formLearned from15 sentences. A male may walk around a track.Logical formLearned from15 sentences. Some trains may end_up on a track.Logical formLearned from15 sentences. A fourth day may pertain-to a track.Logical formLearned from15 sentences. A trip can be around a track.Logical formLearned from15 sentences. A (maintenance vehicle) can be on a track.Logical formLearned from15 sentences. Progress can be on tracks.Logical formLearned from15 sentences. A person may feel a track.Logical formLearned from15 sentences. Tracks may change.Logical formLearned from15 sentences. A curve can be in a track.Logical formLearned from15 sentences. Tracks can be on a side.Logical formLearned from15 sentences. A track may have a surface.Logical formLearned from15 sentences. Persons can be back on track.Logical formLearned from15 sentences. Some (track athletes) may test positive.Logical formLearned from15 sentences.