+----+-----+---------------------+-----+-----+-------+-----+
|    |   A | B                   |   C |   D | E     | F   |
|----+-----+---------------------+-----+-----+-------+-----|
|  0 |   1 | 2013-01-02 00:00:00 |   1 |   3 | test  | foo |
|  1 |   1 | 2013-01-02 00:00:00 |   1 |   3 | train | foo |
|  2 |   1 | 2013-01-02 00:00:00 |   1 |   3 | test  | foo |
|  3 |   1 | 2013-01-02 00:00:00 |   1 |   3 | train | foo |
+----+-----+---------------------+-----+-----+-------+-----+
