Are there either elephants or giraffes that are not black?
No, there is a giraffe but it is black.
    src        edge_attr  dst
0     1   to the left of    3
1     1  to the right of    2
2     2   to the left of    3
3     2   to the left of    1
4     3  to the right of    5
5     3  to the right of    4
6     3  to the right of    7
7     3  to the right of    2
8     3  to the right of    1
9     4   to the left of    3
10    5   to the left of    3
11    7   to the left of    3