What is the person that is to the left of the tennis ball holding?
The man is holding the racket.
    src        edge_attr  dst
0     2   to the left of    3
1     2   to the left of    6
2     3  to the right of    2
3     4  to the right of    9
4     6  to the right of    2
5     7  to the right of    9
6     8          hitting    7
7     8  to the right of    9
8     9         swinging    8
9     9          holding    8
10    9          wearing    2
11    9          hitting    7
12    9          wearing    1
13    9   to the left of    8
14    9   to the left of    7
15    9       looking at    7
16    9   to the left of    4