Who is surfing?
The girl is surfing.
    src        edge_attr  dst
0     1   to the left of    2
1     2       walking on    4
2     2  to the right of    1
3     2       walking in    9
4     3   to the left of   12
5     6               of    2
6     6   to the left of   12
7     7               of    2
8     9               on    4
9    11               of    2
10   12               of    2
11   12  to the right of    6
12   12  to the right of    3
13   13               of    2