Are there doors or cars?
Yes, there are doors.
    src        edge_attr  dst
0     0   to the left of   11
1     1   to the left of    8
2     1  to the right of    7
3     1   to the left of    9
4     1  to the right of    4
5     3   to the left of   11
6     4   to the left of    1
7     4   to the left of    7
8     4               on    1
9     5   to the left of   11
10    7  to the right of    4
11    7   to the left of    1
12    7   to the left of    8
13    8               on    0
14    8  to the right of    7
15    8   to the left of   11
16    8  to the right of    1
17    9  to the right of    1
18    9               of    8
19   11  to the right of    3
20   11  to the right of    0
21   11  to the right of    8
22   11  to the right of    5