What is the person sitting on?
The person is sitting on the bike.
    src        edge_attr  dst
0     1          wearing   10
1     1      in front of    4
2     1           riding    0
3     1       sitting on    0
4     2               of    0
5     3  to the right of    8
6     4           behind    1
7     5   to the left of   10
8     6               of    1
9     6  to the right of    9
10    8   to the left of    3
11    9   to the left of   10
12    9   to the left of    6
13   10  to the right of    9
14   10  to the right of    5
15   11               of    1