Is the tunnel white or red?
The tunnel is white.
     src        edge_attr  dst
0      0   to the left of   15
1      0   to the left of   13
2      0   to the left of   26
3      0   to the left of    6
4      0   to the left of   10
..   ...              ...  ...
120   26   to the left of   20
121   26  to the right of   15
122   26   to the left of   22
123   26   to the left of   21
124   26  to the right of   25

[125 rows x 3 columns]