Are there any children?
Yes, there is a child.
    src        edge_attr  dst
0     0  to the right of   13
1     0  to the right of   16
2     0  to the right of    7
3     0           riding   14
4     0   to the left of    6
5     0  to the right of    5
6     0   to the left of    2
7     1  to the right of    5
8     1   to the left of    2
9     2  to the right of    1
10    2  to the right of    0
11    3   to the left of    9
12    3   to the left of   15
13    3  to the right of    7
14    5   to the left of    0
15    5   to the left of    1
16    5   to the left of   15
17    6  to the right of   14
18    6  to the right of    9
19    6  to the right of    0
20    7   to the left of    8
21    7   to the left of    9
22    7   to the left of    0
23    7   to the left of    3
24    8  to the right of   13
25    8  to the right of   16
26    8  to the right of    7
27    9  to the right of   16
28    9  to the right of    3
29    9  to the right of   13
30    9   to the left of    6
31    9  to the right of    7
32   10   to the left of   11
33   10  to the right of   16
34   11  to the right of   10
35   12               on   14
36   12  to the right of   13
37   13               on   14
38   13   to the left of    0
39   13   to the left of    9
40   13   to the left of    8
41   13   to the left of   12
42   13           riding   14
43   14   to the left of    6
44   15  to the right of    5
45   15  to the right of    3
46   16   to the left of   10
47   16   to the left of    0
48   16   to the left of    8
49   16   to the left of    9