What color does the jacket that the workers wear have?
The jacket has yellow color.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    6
2     1  to the right of    5
3     3          wearing    2
4     3   to the left of    9
5     5   to the left of    0
6     5   to the left of    1
7     6          wearing   11
8     6   to the left of    0
9     8   to the left of   15
10    9  to the right of    3
11   10          wearing   14
12   15  to the right of    8