What is the aircraft that the plane is in front of called?
The aircraft is a helicopter.
    src        edge_attr  dst
0     0               in    3
1     1               of    4
2     2   to the left of    8
3     4               on   14
4     4      in front of   11
5     4      in front of    2
6     4  to the right of    7
7     6   to the left of   13
8     6   to the left of    8
9     7   to the left of    4
10    8  to the right of    2
11    8  to the right of   12
12    8  to the right of    6
13    8   to the left of   10
14    9   to the left of   12
15    9  to the right of   11
16    9   to the left of   13
17   10  to the right of    8
18   11   to the left of   13
19   11   to the left of    9
20   11           behind    4
21   12   to the left of    8
22   12  to the right of    9
23   13  to the right of    6
24   13  to the right of    9
25   13  to the right of   11