Is it cloudy?
No, it is clear.
    src        edge_attr  dst
0     0   to the left of    6
1     1   to the left of    7
2     2  to the right of   12
3     4           behind   10
4     4   to the left of   12
5     4               of    2
6     5      in front of    6
7     6  to the right of    0
8     7  to the right of    9
9     7  to the right of    1
10    8               by    6
11    9   to the left of    7
12   10      in front of    4
13   11               in   10
14   12   to the left of    2
15   12  to the right of    4