Which color is the tail, dark or blue?
The tail is dark.
    src        edge_attr  dst
0     1             near   16
1     1             near   13
2     1            below    4
3     1             near   14
4     4            above    1
5     4   to the left of    8
6     4  to the right of   11
7     4   to the left of   10
8     4   to the left of   12
9     7  to the right of   13
10    7  to the right of   12
11    7  to the right of   16
12    8             near   15
13    8  to the right of    4
14   10  to the right of   15
15   10             near   15
16   10  to the right of    4
17   11   to the left of    4
18   12  to the right of   16
19   12         crossing   10
20   12               on    8
21   12  to the right of    4
22   12   to the left of    7
23   13   to the left of    7
24   13  to the right of   16
25   13             near    1
26   14             near    1
27   14               on    0
28   15             near   10
29   15   to the left of   10
30   15             near    8
31   16             near    1
32   16   to the left of    7
33   16   to the left of   12
34   16   to the left of   13