What color is the umbrella on the right?
The umbrella is gray.
    src        edge_attr  dst
0     0  to the right of   10
1     0  to the right of    5
2     2  to the right of   12
3     2   to the left of   10
4     5   to the left of   10
5     5   to the left of    0
6     5  to the right of   13
7     5  to the right of   12
8     9   to the left of   13
9     9   to the left of   12
10   10  to the right of    2
11   10   to the left of    0
12   10  to the right of    5
13   11     covered with    8
14   11     covered with    4
15   11     covered with    7
16   12   to the left of    2
17   12  to the right of    9
18   12   to the left of    5
19   12  to the right of   13
20   13   to the left of   12
21   13  to the right of    9
22   13   to the left of    5