Where are the flowers?
The flowers are in the sand.
    src        edge_attr  dst
0     0        pulled by    8
1     1  to the right of    4
2     2  to the right of    6
3     2               in   10
4     3  to the right of   12
5     3  to the right of    7
6     4   to the left of    1
7     5  to the right of   13
8     6   to the left of    2
9     7   to the left of    3
10    8          pulling    0
11   11  to the right of   13
12   12   to the left of    3
13   13   to the left of    5
14   13   to the left of   11