Are there either any visitors or students?
No, there are no students or visitors.
    src        edge_attr  dst
0     0           behind   12
1     0  to the right of    2
2     1  to the right of    8
3     2   to the left of    0
4     4             near    9
5     4  to the right of    7
6     4  to the right of    6
7     4  to the right of   13
8     4  to the right of   11
9     4  to the right of   15
10    5             near   12
11    5   to the left of   12
12    5   to the left of   10
13    5          next to   12
14    6  to the right of    7
15    6   to the left of    4
16    7   to the left of    6
17    7   to the left of    4
18    7  to the right of   10
19    8   to the left of    1
20    9          next to    4
21   10             near   12
22   10  to the right of    5
23   10   to the left of    7
24   10   to the left of   12
25   10   to the left of   15
26   10               on    9
27   10          next to   12
28   11               of   15
29   11   to the left of    4
30   12             near    5
31   12             near   10
32   12  to the right of   10
33   12  to the right of    5
34   13   to the left of    4
35   14               on    4
36   15       walking on    9
37   15       leaning on   12
38   15   to the left of    4
39   15  to the right of   10