Is this a hamburger or a donut?
This is a hamburger.
    src        edge_attr  dst
0     0  to the right of   10
1     0  to the right of   14
2     0  to the right of    3
3     0  to the right of    8
4     0  to the right of    5
5     2  to the right of    7
6     3   to the left of    9
7     3               of   14
8     3   to the left of    0
9     3  to the right of   10
10    3   to the left of   11
11    4               on   13
12    5   to the left of    0
13    5  to the right of   10
14    5   to the left of   11
15    7               on   13
16    7   to the left of    2
17    7   to the left of   12
18    8   to the left of   11
19    8  to the right of   10
20    8               of    5
21    8   to the left of    9
22    8   to the left of    0
23    9  to the right of    3
24    9  to the right of   14
25    9  to the right of    8
26   10   to the left of    0
27   10   to the left of    3
28   10   to the left of   11
29   10   to the left of   14
30   10   to the left of    5
31   10   to the left of    8
32   11               on    6
33   11  to the right of    3
34   11  to the right of    5
35   11  to the right of    8
36   11  to the right of   14
37   11  to the right of   10
38   11               of    9
39   12               on   13
40   12  to the right of    7
41   13               on    6
42   14   to the left of    0
43   14  to the right of   10
44   14   to the left of    9
45   14   to the left of   11