What is the color of the clock below the sky?
The clock is green.
    src        edge_attr  dst
0     2               in    1
1     4               by    5
2     4            below    7
3     4   to the left of    7
4     5            below    7
5     5             near    6
6     5             near    7
7     6             near    5
8     6               by    4
9     7             near    5
10    7  to the right of    4