What are the gray articles of clothing called?
The clothing items are vests.
    src        edge_attr  dst
0     0   to the left of    1
1     0   to the left of    8
2     0   to the left of    7
3     1  to the right of    0
4     2   to the left of    7
5     3   to the left of   12
6     3   to the left of    5
7     3   to the left of    9
8     3   to the left of    7
9     5  to the right of    3
10    6   to the left of    7
11    7  to the right of    6
12    7  to the right of    0
13    7  to the right of    3
14    7  to the right of    2
15    8  to the right of    0
16    9  to the right of    3
17   11               in    4
18   11          wearing    0
19   12  to the right of    3