Who is in front of the sign?
The people are in front of the sign.
    src        edge_attr  dst
0     1  to the right of   13
1     1  to the right of    7
2     2           behind    3
3     2   to the left of    3
4     3  walking towards    2
5     3        on top of    1
6     3      in front of    2
7     3               on    7
8     3  to the right of    2
9     3   to the left of    9
10    7   to the left of    1
11    9               on    7
12    9  to the right of    3
13    9        on top of    1
14    9  to the right of   13
15   10   to the left of   15
16   10   to the left of   14
17   11          wearing    5
18   11            using    4
19   11          wearing    6
20   11      standing on   16
21   11               on   16
22   12   to the left of   17
23   13   to the left of    9
24   13   to the left of    1
25   14  to the right of   10
26   15  to the right of   10
27   17  to the right of   12