What is the image showing?
It is showing a railroad.
    src        edge_attr  dst
0     0  to the right of   10
1     1  to the right of   12
2     1  to the right of   14
3     1  to the right of    7
4     1   to the left of    4
5     2            above    8
6     4  to the right of   12
7     4  to the right of    1
8     4  to the right of   14
9     7   to the left of    8
10    7  to the right of    9
11    7   to the left of    1
12    8  to the right of    7
13    8  to the right of   10
14    8               on   13
15    8            below    2
16    8  to the right of    9
17    9   to the left of    7
18    9   to the left of   10
19    9   to the left of    8
20   10   to the left of    0
21   10   to the left of    8
22   10  to the right of    9
23   10   to the left of   12
24   10   to the left of   14
25   12   to the left of   14
26   12  to the right of   10
27   12   to the left of    4
28   12   to the left of    1
29   14  to the right of   12
30   14  to the right of   10
31   14   to the left of    4
32   14   to the left of    1