Are the forks made of steel or plastic?
The forks are made of steel.
    src        edge_attr  dst
0     2               on    1
1     3               of   10
2     3  to the right of    5
3     3   to the left of    4
4     4               on    1
5     4  to the right of   10
6     4  to the right of    3
7     5   to the left of    3
8     6               in    9
9     6   to the left of   11
10    6               on    9
11    8               on    1
12    9   to the left of   11
13   10   to the left of    4
14   11               on    1
15   11  to the right of    9
16   11  to the right of    6
17   11               on    8