Is there a train or a door in the picture?
No, there are no trains or doors.
     src        edge_attr  dst
0      0   to the left of   16
1      0   to the left of    7
2      0   to the left of   32
3      1               on    9
4      1  to the right of   20
..   ...              ...  ...
211   39  to the right of   29
212   39   to the left of    4
213   39  to the right of   13
214   39   to the left of    7
215   39  to the right of   19

[216 rows x 3 columns]