Which color is the hat the bear is wearing?
The hat is blue.
    src        edge_attr  dst
0     2  to the right of    6
1     3  to the right of   13
2     3  to the right of    9
3     3  to the right of   15
4     3  to the right of    8
5     4  to the right of    8
6     5  to the right of    6
7     6   to the left of    5
8     6   to the left of    2
9     8   to the left of    4
10    8   to the left of    3
11    8   to the left of    9
12    9   to the left of    3
13    9  to the right of    8
14    9  to the right of   15
15   12          wearing    4
16   12          wearing   13
17   12          wearing   11
18   12          wearing   10
19   13  to the right of   15
20   13   to the left of    3
21   15   to the left of   13
22   15   to the left of    9
23   15   to the left of    3