Which color is the man vest?
The vest is gray.
    src        edge_attr  dst
0     0   to the left of   11
1     0   to the left of    9
2     1   to the left of    9
3     1  to the right of   12
4     1   to the left of   11
5     1             near    6
6     2  to the right of   12
7     2   to the left of    9
8     3   to the left of   12
9     5   to the left of    9
10    5   to the left of   11
11    6  to the right of   12
12    6             near    1
13    6          wearing    5
14    6   to the left of   11
15    6   to the left of    9
16    9  to the right of    6
17    9  to the right of   12
18    9  to the right of    0
19    9  to the right of    1
20    9  to the right of    2
21    9  to the right of    5
22   11  to the right of    0
23   11  to the right of    6
24   11  to the right of    5
25   11  to the right of    1
26   12  to the right of    3
27   12   to the left of    2
28   12   to the left of    1
29   12   to the left of    6
30   12   to the left of    9