Which color is the shirt he wears?
The shirt is gray.
    src        edge_attr  dst
0     0  to the right of    9
1     0  to the right of   17
2     0  to the right of   16
3     0               of    2
4     1  to the right of    9
5     1   to the left of    5
6     1            below    2
7     2   to the left of    5
8     2  to the right of    4
9     2  to the right of    9
10    2  to the right of   16
11    4   to the left of    2
12    5  to the right of    1
13    5  to the right of    6
14    5  to the right of    2
15    5  to the right of    7
16    6          holding    9
17    6          wearing    2
18    6   to the left of   10
19    6          wearing   12
20    6  to the right of   11
21    6   to the left of    5
22    7   to the left of    5
23    7  to the right of   11
24    7  to the right of   18
25    7  to the right of    9
26    9   to the left of    7
27    9   to the left of    1
28    9   to the left of    0
29    9   to the left of    2
30   10  to the right of    6
31   10  to the right of   12
32   11   to the left of    7
33   11   to the left of    6
34   12   to the left of   10
35   13               on   14
36   16   to the left of    2
37   16   to the left of    0
38   17   to the left of    0
39   18   to the left of    7