What color is the shoe?
The shoe is gray.
    src        edge_attr  dst
0     0        on top of    3
1     0   to the left of    2
2     1   on the back of   13
3     1   to the left of    4
4     2  to the right of    3
5     2  to the right of    0
6     3   to the left of    2
7     4   to the left of    5
8     4        on top of    8
9     4  to the right of    1
10    4   to the left of   10
11    5  to the right of    4
12    5  to the right of   13
13    5  to the right of    6
14    6   to the left of    5
15    6        on top of    8
16    6   to the left of   10
17    7          wearing   14
18    7          wearing   15
19    7          wearing    2
20    7            using   13
21    7       sitting in   12
22    9   to the left of   10
23   10  to the right of   13
24   10  to the right of    4
25   10  to the right of    6
26   10  to the right of    9
27   13        on top of    7
28   13   to the left of   16
29   13   to the left of   10
30   13   to the left of    5
31   16  to the right of   13