A piece can be to a puzzle.Logical formLearned from161 sentences. Puzzles can be simple.Logical formLearned from155 sentences. A puzzle can be interesting.Logical formLearned from152 sentences. A puzzle may be solved.Logical formLearned from148 sentences. A puzzle may pertain-to persons.Logical formLearned from148 sentences. A solution can be to a puzzle.Logical formLearned from146 sentences. A piece can be to a puzzle.Logical formLearned from145 sentences. A puzzle can be to a person.Logical formLearned from145 sentences. A puzzle may pertain-to a weekday.Logical formLearned from142 sentences. Puzzles may pertain-to a game.Logical formLearned from133 sentences. Pieces can be to a puzzle.Logical formLearned from132 sentences. A puzzle can be difficult.Logical formLearned from128 sentences. A puzzle can be complicated.Logical formLearned from127 sentences. Puzzles can be complex.Logical formLearned from126 sentences. Puzzles can be difficult.Logical formLearned from124 sentences.