Are there both trains and cars in this picture?
Yes, there are both a train and cars.
    src        edge_attr  dst
0     0  to the right of    2
1     1   to the left of   15
2     2   to the left of    4
3     2   to the left of    0
4     4  to the right of    2
5     5               of    1
6     7  to the right of    8
7     8   to the left of    7
8    10  to the right of   11
9    10  to the right of   13
10   11  to the right of   13
11   11  to the right of   12
12   11   to the left of   10
13   12   to the left of   13
14   12   to the left of   11
15   12  to the right of   14
16   13  to the right of   14
17   13   to the left of   10
18   13  to the right of   12
19   13   to the left of   11
20   14   to the left of   12
21   14   to the left of   13
22   15  to the right of    1