Is he holding the red sign?
Yes, the worker is holding the sign.
    src        edge_attr  dst
0     0  to the right of    6
1     1   to the left of    8
2     4   to the left of    9
3     4   to the left of    8
4     4   to the left of    6
5     6   to the left of    0
6     6  to the right of    7
7     6  to the right of    4
8     6   to the left of    8
9     7   to the left of    9
10    7   to the left of    6
11    8  to the right of    1
12    8  to the right of    6
13    8  to the right of    4
14    9          holding    5
15    9  to the right of    7
16    9  to the right of    4