Which kind of vehicle is large?
The vehicle is a train.
    src        edge_attr  dst
0     1           behind    4
1     1   to the left of    9
2     1   to the left of    8
3     1  to the right of    2
4     2   to the left of    9
5     2   to the left of    1
6     4             near    9
7     4               by    9
8     4      in front of    1
9     4           behind    9
10    4   to the left of    9
11    5  to the right of    8
12    5   to the left of    6
13    6           behind    9
14    6  to the right of    9
15    6  to the right of    5
16    7               on    4
17    8   on the side of    9
18    8   to the left of    5
19    8  on the front of    9
20    8  to the right of    1
21    9      in front of    6
22    9             near    4
23    9      in front of    4
24    9  to the right of    1
25    9  to the right of    2
26    9  to the right of    4
27    9   to the left of    6