What is the animal that is gray called?
The animal is an elephant.
    src        edge_attr  dst
0     1               in    0
1     1         carrying   10
2     1          pulling   12
3     1  to the right of    3
4     1  to the right of    8
5     2  to the right of   10
6     2  to the right of    6
7     2               of    2
8     2   to the left of    5
9     2   to the left of    4
10    3   to the left of   15
11    3   to the left of    1
12    3  to the right of    8
13    3               on   11
14    4  to the right of    6
15    4  to the right of    2
16    4  to the right of   10
17    5  to the right of    2
18    6   to the left of    4
19    6   to the left of    2
20    6  to the right of   16
21    6   to the left of   10
22    8   to the left of    3
23    8   to the left of    1
24    9  to the right of   15
25   10  to the right of    6
26   10  to the right of   15
27   10           riding    1
28   10               on    1
29   10   to the left of    4
30   10   to the left of    2
31   12        pulled by    1
32   13               of    1
33   15           riding    1
34   15  to the right of    3
35   15   to the left of    9
36   15   to the left of   10
37   15   to the left of   17
38   15               on    1
39   16   to the left of    6
40   17               on    1
41   17  to the right of   15