Which kind of clothing is gray?
The clothing is a vest.
    src        edge_attr  dst
0     0             with    1
1     0               on   13
2     0             near    7
3     0          next to    7
4     1               on    0
5     3               of    7
6     3  to the right of    5
7     4               of    7
8     4   to the left of   15
9     4   to the left of   11
10    5   to the left of    3
11    7          wearing   16
12    7          wearing    2
13    7             near    0
14    7          holding    0
15    7   to the left of   11
16    7   to the left of   15
17   11  to the right of    7
18   11  to the right of    4
19   11  to the right of   12
20   12   to the left of   15
21   12   to the left of   11
22   15  to the right of    4
23   15  to the right of    7
24   15  to the right of   12
25   15  to the right of   16
26   15               of    7
27   16   to the left of   15