The car is holding what?
The car is holding the steps.
     src        edge_attr  dst
0      0  to the right of   14
1      0  to the right of    3
2      1   to the left of   14
3      2  to the right of    6
4      2         boarding    8
..   ...              ...  ...
109   22               on   21
110   22         boarding    8
111   22               at   21
112   24  to the right of   20
113   24  to the right of   12

[114 rows x 3 columns]