What's the fork made of?
The fork is made of plastic.
    src        edge_attr  dst
0     0   to the left of    3
1     0   to the left of    2
2     1               on    0
3     1   to the left of    3
4     2  to the right of    6
5     2  to the right of    0
6     3  to the right of    0
7     3  to the right of    6
8     3  to the right of    1
9     3  to the right of    7
10    6   to the left of    3
11    6   to the left of    2
12    7   to the left of    3