What place does this represent?
It represents the classroom.
    src        edge_attr  dst
0     2   to the left of   17
1     2   to the left of   16
2     2  to the right of   11
3     2  to the right of    5
4     2  to the right of    3
..  ...              ...  ...
76   20  to the right of    3
77   20   to the left of   16
78   20  to the right of    9
79   20   to the left of    8
80   20  to the right of   18

[81 rows x 3 columns]