What is parked in the parking lot?
The bus is parked in the parking lot.
    src        edge_attr  dst
0     1   to the left of    2
1     1   to the left of   13
2     2  to the right of    4
3     2  to the right of    1
4     3  to the right of   11
5     4   to the left of    2
6     4               of   13
7     5  to the right of   13
8     6   to the left of   13
9     6   to the left of   12
10    7               of   13
11   10   to the left of   14
12   10               of   13
13   11   to the left of    3
14   12   to the left of   13
15   12  to the right of    6
16   13   to the left of    5
17   13  to the right of    6
18   13  to the right of   12
19   13        parked in    0
20   13  to the right of    1
21   14  to the right of   10