Are there tractors or taxis that are not red?
No, there is a taxi but it is red.
    src        edge_attr  dst
0     0   to the left of   20
1     0   to the left of   10
2     0   to the left of    3
3     0   to the left of    7
4     0   to the left of    6
..  ...              ...  ...
93   25   to the left of   26
94   26  to the right of    9
95   26  to the right of   18
96   26  to the right of   25
97   26  to the right of   19

[98 rows x 3 columns]