Which kind of clothing is gray?
The clothing is a hat.
    src        edge_attr  dst
0     0               by    2
1     0   to the left of    2
2     0   to the left of    6
3     1            below    2
4     1        on top of    3
5     1            under    2
6     1   to the left of    5
7     1          wearing    2
8     1   to the left of    2
9     2        on top of    1
10    2  to the right of    7
11    2  to the right of    1
12    2  to the right of    0
13    2            above    1
14    3   to the left of    5
15    4   to the left of    5
16    5  to the right of    1
17    5  to the right of    3
18    5  to the right of    4
19    6  to the right of    0
20    7   to the left of    2