What is the aircraft that is standing on the ground called?
The aircraft is an airplane.
    src        edge_attr  dst
0     1   to the left of    8
1     1   to the left of   11
2     1   to the left of   10
3     2   to the left of    3
4     3   to the left of   10
5     3  to the right of    2
6     5   to the left of   11
7     5   on the side of    6
8     6      standing on    7
9     8  to the right of    9
10    8  to the right of    1
11    9   to the left of    8
12    9   to the left of   10
13   10  to the right of    3
14   10  to the right of    1
15   10  to the right of    9
16   11   on the side of    6
17   11  to the right of    1
18   11  to the right of    5
19   12  to the right of   13
20   13   to the left of   12