What are the people doing?
The people are walking.
    src        edge_attr  dst
0     0   to the left of   11
1     0  to the right of    3
2     1   to the left of   19
3     1  to the right of   13
4     1  to the right of   20
5     2           behind   16
6     2   to the left of   11
7     2   to the left of    7
8     2   to the left of   18
9     2  to the right of   14
10    2  to the right of    5
11    3   to the left of   16
12    3               on    4
13    3   to the left of    0
14    5   to the left of    2
15    5  to the right of   14
16    5   to the left of   15
17    7  to the right of   13
18    7  to the right of   15
19    7  to the right of    2
20    8  to the right of   14
21   10   to the left of   17
22   11  to the right of    2
23   11  to the right of    0
24   11  to the right of   15
25   11  to the right of   13
26   12   to the left of   16
27   13   to the left of    7
28   13   to the left of   11
29   13   to the left of    1
30   13   to the left of   20
31   13   to the left of   18
32   14   to the left of    2
33   14   to the left of    5
34   14   to the left of    8
35   14   to the left of   15
36   15   to the left of   11
37   15  to the right of    5
38   15  to the right of   14
39   15   to the left of    7
40   16  to the right of    3
41   16  to the right of   12
42   16   to the left of   19
43   16  to the right of   21
44   16      in front of    2
45   17  on the front of   16
46   17  to the right of   10
47   18  to the right of    2
48   18  to the right of   13
49   19  to the right of   16
50   19  to the right of    1
51   20   to the left of    1
52   20  to the right of   13
53   21   to the left of   16