Which color is the car in the center?
The car is red.
    src        edge_attr  dst
0     0  to the right of   20
1     2        pulled by   10
2     2        pulled by   12
3     2  to the right of    9
4     2  to the right of    8
..  ...              ...  ...
92   19  to the right of    8
93   20   to the left of    0
94   21  to the right of    5
95   21  to the right of   10
96   21   to the left of   18

[97 rows x 3 columns]