What color is the shirt he is wearing?
The shirt is gray.
    src        edge_attr  dst
0     0          wearing    4
1     0          wearing    7
2     0      in front of   12
3     0          holding    6
4     0          wearing    5
5     0          wearing   13
6     0          wearing   10
7     0   to the left of    2
8     0          wearing    8
9     0          wearing    3
10    1   flying through    2
11    1     flying above   11
12    1  to the right of    2
13    2   to the left of    1
14    2  to the right of    3
15    2  to the right of    0
16    3   to the left of    2
17    3  to the right of    6
18    5   to the left of   13
19    6   to the left of    3
20   10   to the left of   13
21   12           behind    0
22   13  to the right of   10
23   13  to the right of    5