Which kind of animal is walking on the dirt?
The animals are elephants.
    src        edge_attr  dst
0     0   to the left of    1
1     1  to the right of   18
2     1  to the right of    0
3     2             near    6
4     2  to the right of    3
5     3  to the right of    5
6     3   to the left of    6
7     3   to the left of    2
8     3   to the left of   16
9     5   to the left of    3
10    5   to the left of   15
11    6             near    2
12    6  to the right of    3
13    7   to the left of    9
14    7   to the left of    8
15    7   to the left of   13
16    7            above   15
17    8  to the right of    7
18    8               on    3
19    8   to the left of   16
20    8  to the right of   11
21    8   to the left of    9
22    9  to the right of   10
23    9   to the left of   13
24    9  to the right of    8
25    9   to the left of   16
26    9  to the right of    7
27   10   to the left of   13
28   10   to the left of    9
29   11   to the left of    8
30   12            above   10
31   12               on   17
32   13  to the right of    7
33   13  to the right of   10
34   13  to the right of    9
35   15  to the right of    5
36   15       walking on   18
37   16          holding    3
38   16  to the right of    9
39   16  to the right of    3
40   16  to the right of    8
41   18   to the left of    1