Is the boat to the left of the traffic lights?
Yes, the boat is to the left of the traffic lights.
    src        edge_attr  dst
0     1  to the right of   13
1     1   to the left of   10
2     1   to the left of   20
3     1   to the left of   16
4     1   to the left of    4
..  ...              ...  ...
81   19   to the left of   17
82   20   to the left of    8
83   20  to the right of    1
84   20  to the right of    9
85   20  to the right of   12

[86 rows x 3 columns]