Is the car to the left or to the right of the van?
The car is to the left of the van.
    src        edge_attr  dst
0     0   to the left of   13
1     0               on    1
2     1   to the left of   10
3     1   to the left of   13
4     2             near    6
5     2  to the right of   15
6     3  to the right of    9
7     3  to the right of   10
8     3   to the left of   15
9     4   to the left of    7
10    4  to the right of   15
11    4  to the right of   14
12    6             near    2
13    7  to the right of   13
14    7  to the right of    8
15    7  to the right of    4
16    7  to the right of   14
17    8             near   13
18    8  to the right of   15
19    8  to the right of   14
20    8   to the left of    7
21    9             near   13
22    9   to the left of   13
23    9   to the left of    3
24    9   to the left of   10
25   10   to the left of   15
26   10  to the right of    9
27   10   to the left of    3
28   10  to the right of    1
29   12               on   15
30   13             near    8
31   13             near    9
32   13  to the right of    1
33   13  to the right of    0
34   13  to the right of    9
35   13   to the left of    7
36   14   to the left of    7
37   14   to the left of    4
38   14   to the left of    8
39   15  to the right of    3
40   15   to the left of    8
41   15  to the right of   10
42   15   to the left of    4
43   15   to the left of    2