Is the red food to the left or to the right of the cheese?
The food is to the right of the cheese.
    src        edge_attr  dst
0     1               on    6
1     1  to the right of   10
2     1  to the right of    4
3     1  to the right of    7
4     2               on    1
5     2               of    1
6     2  to the right of    4
7     4   to the left of    2
8     4   to the left of    1
9     6               on    0
10    7               of    6
11    7   to the left of    1
12    7               on    6
13    9       sitting at    0
14   10   to the left of    1