Are there either green melons or watermelons?
No, there is a melon but it is orange.
    src        edge_attr  dst
0     0   to the left of    4
1     0  to the right of    1
2     1   to the left of    7
3     1   to the left of    5
4     1   to the left of    2
5     1   to the left of    0
6     2  to the right of    1
7     3  to the right of    7
8     3               in    2
9     3  to the right of    5
10    4  to the right of    0
11    4  to the right of    8
12    4  to the right of    6
13    5   to the left of    3
14    5               in    2
15    5  to the right of    1
16    6   to the left of    4
17    7  to the right of    1
18    7   to the left of    3
19    7               in    2
20    8   to the left of    4