Do you see both a taxi and a mirror?
Yes, there are both a taxi and a mirror.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of    4
2     1   to the left of    2
3     1  to the right of   10
4     1   to the left of    5
5     2  to the right of    1
6     2   to the left of    3
7     3  to the right of    4
8     3  to the right of    2
9     4  to the right of   10
10    4   to the left of    3
11    4  to the right of    0
12    4   to the left of    7
13    5  to the right of    1
14    5   to the left of    7
15    5  to the right of   10
16    7  to the right of    4
17    7  to the right of    5
18   10   to the left of    1
19   10   to the left of    5
20   10   to the left of    4
21   10  to the right of    0