What is on the island?
The traffic light is on the island.
     src        edge_attr  dst
0      0  to the right of   22
1      0  to the right of    3
2      0  to the right of    1
3      0   to the left of   13
4      0  to the right of   17
..   ...              ...  ...
135   32  to the right of   23
136   33   to the left of    1
137   33   to the left of   18
138   33   to the left of    3
139   33   to the left of   32

[140 rows x 3 columns]