Which place is it?
It is a zoo.
   src        edge_attr  dst
0    1  to the right of   12
1    4   to the left of   11
2    7               on    8
3    7   to the left of   11
4   11               of    0
5   11  to the right of    4
6   11  to the right of    7
7   12   to the left of   13
8   12   to the left of    1
9   13  to the right of   12