What is the color of the car in the middle?
The car is gray.
    src        edge_attr  dst
0     0             near   14
1     1               of   11
2     1               on   11
3     1   to the left of   18
4     1  to the right of   10
..  ...              ...  ...
71   20  to the right of    7
72   20   to the left of    2
73   20  to the right of   19
74   20               on    0
75   22  to the right of    4

[76 rows x 3 columns]