On which side is the fork?
The fork is on the left of the image.
    src        edge_attr  dst
0     0  to the right of   12
1     1   to the left of   15
2     1   to the left of    8
3     1   to the left of    7
4     2  to the right of    4
5     2  to the right of   12
6     2  to the right of    9
7     3  to the right of    7
8     3  to the right of   15
9     4   to the left of    2
10    4  to the right of   11
11    7  to the right of   15
12    7  to the right of    1
13    7   to the left of    3
14    8  to the right of    1
15    8  to the right of   14
16    8  to the right of   15
17    9   to the left of    2
18   11   to the left of    4
19   12   to the left of    2
20   12   to the left of    0
21   14   to the left of    8
22   14   to the left of   15
23   15  to the right of   14
24   15   to the left of    8
25   15   to the left of    7
26   15   to the left of    3
27   15  to the right of    1
28   16        on top of    5