Which place is it?
It is an airport.
    src        edge_attr  dst
0     0   to the left of   15
1     0   to the left of   13
2     0   to the left of    1
3     0   to the left of   11
4     1  to the right of    0
5     1  to the right of   13
6     1   to the left of   16
7     1  to the right of   10
8     3   to the left of   18
9     3   to the left of    9
10    3   to the left of    6
11    3  to the right of    5
12    3   to the left of   19
13    5   to the left of    3
14    5   to the left of    9
15    6   to the left of   19
16    6   to the left of   18
17    6  to the right of    3
18    7           behind    8
19    7   to the left of   10
20    8      in front of    7
21    9  to the right of    5
22    9  to the right of    3
23    9   to the left of   19
24    9   to the left of   18
25   10  to the right of    7
26   10   to the left of   13
27   10   to the left of    1
28   11   to the left of   16
29   11  to the right of    0
30   13  to the right of    0
31   13   to the left of   16
32   13   to the left of    1
33   13  to the right of   10
34   15  to the right of    0
35   15   to the left of   16
36   16  to the right of   15
37   16  to the right of    1
38   16  to the right of   18
39   16  to the right of   13
40   16  to the right of   19
41   16  to the right of   11
42   18  to the right of    3
43   18   to the left of   16
44   18  to the right of    9
45   18  to the right of    6
46   19  to the right of    3
47   19   to the left of   16
48   19  to the right of    9
49   19  to the right of    6