Is this skateboard red or gray?
The skateboard is gray.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    1
2     1  to the right of    2
3     1  to the right of    0
4     1  to the right of    5
5     1  to the right of    9
6     2   to the left of    1
7     3          wearing    1
8     3  to the right of    0
9     3  to the right of    5
10    3  to the right of    9
11    3        riding on    6
12    3          wearing    4
13    3          holding    5
14    5   to the left of    3
15    5   to the left of    1
16    9   to the left of    1
17    9   to the left of    3