On which side of the picture is the green lettuce?
The lettuce is on the left of the image.
    src        edge_attr  dst
0     0               on    8
1     0  to the right of    4
2     1  to the right of   14
3     1  to the right of    9
4     1               on   14
5     1   to the left of    2
6     1  to the right of    4
7     2  to the right of    1
8     2  to the right of    7
9     3  to the right of   12
10    3               on   18
11    4   to the left of    8
12    4   to the left of    0
13    4               on    9
14    4   to the left of   15
15    4   to the left of    1
16    5          next to    6
17    5             near    6
18    6             near    5
19    7  to the right of   14
20    7   to the left of    2
21    8  to the right of    4
22    9   to the left of    1
23    9   to the left of   15
24    9   to the left of   16
25   10               on   18
26   12   to the left of    3
27   12  to the right of   13
28   13   to the left of   12
29   14   to the left of    7
30   14   to the left of    1
31   15  to the right of    4
32   15  to the right of   16
33   15  to the right of    9
34   16               in    1
35   16   to the left of   15
36   16  to the right of    9
37   17            under   18
38   17               on   14
39   17            below   18
40   18            above   17