What is the green vehicle called?
The vehicle is a wagon.
    src        edge_attr  dst
0     1   to the left of    2
1     1   to the left of    4
2     2  to the right of    7
3     2  to the right of    1
4     2          wearing    6
5     2          wearing    4
6     2  to the right of    5
7     4  to the right of    1
8     4  to the right of    7
9     5   to the left of    6
10    5   to the left of    2
11    6  to the right of    5
12    7          wearing    1
13    7          wearing    5
14    7   to the left of    4
15    7   to the left of    2