A pin can be flat.Logical formLearned from18 sentences. A (track roller derby) can be flat.Logical formLearned from18 sentences. A flat fee can be for services.Logical formLearned from18 sentences. A (passenger seat) may fold flat.Logical formLearned from18 sentences. A flat fee can be one-time.Logical formLearned from18 sentences. A roof of a mouth can be flat.Logical formLearned from18 sentences. Decks can be flat.Logical formLearned from18 sentences. A (metal surface) can be flat.Logical formLearned from18 sentences. A culture can be flat.Logical formLearned from18 sentences. A (file structure) can be flat.Logical formLearned from18 sentences. Costs can be flat.Logical formLearned from18 sentences. Speakers can be flat.Logical formLearned from18 sentences. A corridor can be flat.Logical formLearned from18 sentences. A (priority box) can be flat.Logical formLearned from18 sentences. A rating can be flat.Logical formLearned from18 sentences.