physician | department | primaryaffiliation
-----------+------------+--------------------
         1 |          1 | t
         2 |          1 | t
         3 |          1 | f
         3 |          2 | t
         4 |          1 | t
         5 |          1 | t
         6 |          2 | t
         7 |          1 | f
         7 |          2 | t
         8 |          1 | t
         9 |          3 | t