What is the bicycle leaning against?
The bicycle is leaning against the tree.
    src        edge_attr  dst
0     0   to the left of    1
1     1  to the right of    0
2     1  to the right of    7
3     1   to the left of   10
4     1  to the right of   14
5     1  to the right of    9
6     1  to the right of   13
7     2   to the left of    4
8     2   to the left of   14
9     2   to the left of    9
10    2   to the left of   13
11    2   to the left of    7
12    4  to the right of    2
13    6   to the left of   13
14    6   to the left of   14
15    6   to the left of    9
16    6   to the left of    7
17    7  to the right of    2
18    7  to the right of    6
19    7   to the left of    1
20    9   to the left of    1
21    9  to the right of    6
22    9  to the right of    2
23   10  to the right of    1
24   13  leaning against   14
25   13   to the left of    1
26   13  to the right of    2
27   13  to the right of    6
28   14  to the right of    2
29   14   to the left of    1
30   14  to the right of    6