What is the runway before?
The runway is in front of the mountain.
    src        edge_attr  dst
0     0               by    5
1     0               by    6
2     0   to the left of    5
3     1  to the right of    2
4     1               by    6
5     1  to the right of    5
6     2  to the right of    9
7     2   to the left of    1
8     5               on    6
9     5   to the left of    1
10    5  to the right of    0
11    5      in front of   10
12    6      in front of   10
13    7               on    6
14    9   to the left of    2