What is the shirtless boy walking on?
The boy is walking on the bridge.
    src        edge_attr  dst
0     0   to the left of   20
1     1   to the left of    8
2     1   to the left of    5
3     1   to the left of   19
4     1   to the left of   12
..  ...              ...  ...
82   20  to the right of    2
83   20  to the right of   10
84   20  to the right of    9
85   20  to the right of    0
86   20  to the right of    6

[87 rows x 3 columns]