Who is walking down the platform?
The man is walking down the platform.
     src        edge_attr  dst
0      0   to the left of   12
1      0  to the right of    1
2      1   to the left of   15
3      1   to the left of    9
4      1   to the left of    0
..   ...              ...  ...
98    17  to the right of    8
99    18  to the right of    1
100   18   to the left of   17
101   18   to the left of   15
102   18  to the right of    2

[103 rows x 3 columns]