How tall is the field?
The field is tall.
    src        edge_attr  dst
0     0               of    7
1     0  to the right of   13
2     0  to the right of   12
3     1               of   12
4     1  to the right of    9
5     1   to the left of    5
6     2  to the right of    8
7     2   to the left of    6
8     2   to the left of    5
9     2               of    7
10    3               of    7
11    3   to the left of    5
12    3  to the right of    8
13    3   to the left of    6
14    3  to the right of   11
15    3  to the right of   10
16    4   to the left of    6
17    4  to the right of    8
18    4               on    7
19    4  to the right of    9
20    5  to the right of    1
21    5  to the right of    2
22    5  to the right of    3
23    5  to the right of   12
24    6  to the right of    3
25    6  to the right of    4
26    6  to the right of   12
27    6               of    7
28    6  to the right of    2
29    7      eating from   12
30    7      in front of   12
31    8               of    7
32    8   to the left of    4
33    8   to the left of    3
34    8   to the left of    2
35    9               of    7
36    9   to the left of    1
37    9   to the left of    4
38   10               of    7
39   10   to the left of    3
40   11               of    7
41   11   to the left of    3
42   12   to the left of    0
43   12   to the left of    5
44   12           behind    7
45   12               of   12
46   12   to the left of    6
47   13               of   12
48   13   to the left of    0