Are there skateboards or flags that are blue?
Yes, the skateboard is blue.
   src        edge_attr  dst
0    0               on    5
1    0   to the left of    4
2    0   to the left of    1
3    1  to the right of    0
4    1   to the left of    4
5    2               on    5
6    3      in front of    5
7    4  to the right of    1
8    4  to the right of    0
9    5           behind    3