Are there dinosaurs or birds?
Yes, there is a bird.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of    3
2     1      swimming in    2
3     1   to the left of   11
4     3  to the right of    0
5     4      swimming in    2
6     6  to the right of    0
7     7      flying over    2
8     7   to the left of   13
9     7      swimming in    2
10    8  to the right of   11
11    9   to the left of   12
12   10      flying over    2
13   11      swimming in    2
14   11   to the left of    8
15   11  to the right of    1
16   12      flying over    2
17   12  to the right of    9
18   13  to the right of    7
19   13      flying over    2