Do you see a black truck?
No, there is a truck but it is white.
    src        edge_attr  dst
0     2  on the front of    0
1     2  to the right of   11
2     3   to the left of    9
3     3   to the left of    6
4     5   to the left of    9
5     6  to the right of    3
6     6   on the side of    9
7     9  to the right of    5
8     9  to the right of    3
9    11   to the left of    2
10   11  to the right of   14
11   11  to the right of   12
12   12   to the left of   14
13   12   to the left of   11
14   14  to the right of   12
15   14   to the left of   11