Which color is the umbrella that is not dry?
The umbrella is gray.
    src        edge_attr  dst
0     2  to the right of   10
1     2  to the right of    9
2     3   to the left of   10
3     3   to the left of    9
4     3   to the left of    4
5     4   to the left of    9
6     4  to the right of    3
7     4   to the left of   10
8     5  to the right of    6
9     5  to the right of    9
10    6   to the left of    5
11    8               on    2
12    9   to the left of    2
13    9  to the right of    3
14    9  to the right of    4
15    9   to the left of    5
16   10   to the left of    2
17   10  to the right of    3
18   10  to the right of    4