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