What is the vehicle to the left of the wheelchair?
The vehicle is a train.
    src         edge_attr  dst
0     0   on the front of   11
1     0    to the left of    1
2     0   to the right of   10
3     1   to the right of    0
4     2    to the left of    3
5     3   to the right of    2
6     3    to the left of   15
7     3  on the bottom of   11
8     4    on the side of    9
9     4    to the left of   11
10    5    to the left of   11
11    6   to the right of   11
12    6   to the right of   16
13    6                on   15
14    6   to the right of    8
15    7   to the right of   11
16    8   to the right of   11
17    8    to the left of    6
18    8        sitting in   16
19    9    to the left of   11
20   10    to the left of   11
21   10    to the left of    0
22   11   to the right of    5
23   11   to the right of   10
24   11    to the left of    7
25   11   to the right of    4
26   11              near   16
27   11   to the right of    9
28   11    to the left of    6
29   11    to the left of    8
30   11    to the left of   15
31   11    to the left of   16
32   13    on the side of   11
33   15   to the right of   11
34   15   to the right of    3
35   16    to the left of    6
36   16   to the right of   11
37   16           next to   11
38   16              near   11