Which item of clothing is not black, the hat or the shirt?
The hat is not black.
   src        edge_attr  dst
0    1               on   10
1    1  to the right of    3
2    2  to the right of    3
3    3   to the left of   10
4    3   to the left of    9
5    3               by   10
6    3   to the left of    2
7    3   to the left of    1
8    9  to the right of    3
9   10  to the right of    3