+------+------------+---------------+
| sid  | str        | annot         |
+======+============+===============+
|    1 |  string 1  | ABCDEFBCDF    |
|    2 |  string 2  | ABCDEFGBCDEGH |
|    3 |  string 3  | AAACDECDEBBB  |
+------+------------+---------------+