Do the sign and the cap have the same color?
Yes, both the sign and the cap are white.
    src        edge_attr  dst
0     2   to the left of   13
1     2  to the right of    4
2     3          wearing    9
3     3          wearing   16
4     3          wearing    2
5     3          holding    4
6     3          wearing    8
7     3          wearing   11
8     3          wearing    6
9     3          wearing   13
10    3          wearing    5
11    3       picking up   10
12    4   to the left of    9
13    4   to the left of    2
14    5   to the left of    8
15    5   to the left of    6
16    6  to the right of    5
17    7               on    0
18    8   to the left of   10
19    8  to the right of    5
20    9  to the right of    4
21    9   to the left of   16
22    9  to the right of   14
23   10  to the right of    8
24   13  to the right of    2
25   13               on   12
26   14   to the left of    9
27   14   to the left of   16
28   15   to the left of   16
29   16  to the right of    9
30   16  to the right of   14
31   16  to the right of   15