What color does the tennis ball the words are on have?
The tennis ball has yellow color.
    src        edge_attr  dst
0     0               on   14
1     2   to the left of   12
2     3               on    9
3     3  to the right of   16
4     3  to the right of    6
5     5  to the right of   16
6     5  to the right of   13
7     6   to the left of    9
8     6   to the left of    3
9     6           behind   16
10    6   to the left of   11
11    7   to the left of   11
12    8  to the right of   16
13    9  to the right of   16
14    9  to the right of    6
15   10   to the left of   11
16   11  to the right of    6
17   11  to the right of   13
18   11  to the right of   10
19   11          wearing    5
20   11          wearing    8
21   11  to the right of   12
22   11          wearing    3
23   11  to the right of   17
24   11  to the right of    7
25   11  to the right of   16
26   12  to the right of    2
27   12   to the left of   13
28   12   to the left of   11
29   13   to the left of    5
30   13   to the left of   11
31   13  to the right of   12
32   15  to the right of   16
33   16   to the left of    9
34   16   to the left of   11
35   16   to the left of   15
36   16         swinging    2
37   16      in front of    6
38   16          hitting   14
39   16   to the left of    8
40   16          wearing   12
41   16          wearing    7
42   16          wearing    4
43   16   to the left of    5
44   16   to the left of    3
45   17   to the left of   11