How is the vehicle that is made of same material as the fence called?
The vehicle is a tractor.
    src        edge_attr  dst
0     0  to the right of    8
1     0               of    9
2     0  to the right of    5
3     1  to the right of    8
4     2   to the left of    8
5     3               on    6
6     3   to the left of    4
7     4  to the right of    7
8     4  to the right of    3
9     5   to the left of    0
10    5  to the right of    8
11    6   to the left of    7
12    7   to the left of    4
13    7  to the right of    6
14    8   to the left of    9
15    8   to the left of    0
16    8           behind    9
17    8  to the right of    2
18    8   to the left of    1
19    8   to the left of    5
20    9  to the right of    8
21    9      in front of    8