What is pushed by the person in the center?
The stroller is pushed by the man.
    src        edge_attr  dst
0     0   to the left of   13
1     0   to the left of    7
2     1   to the left of    8
3     1   to the left of    9
4     1  to the right of    7
5     1          pushing    6
6     3   to the left of    6
7     3   to the left of    8
8     3               on   14
9     3   to the left of    9
10    5               on   13
11    6        pushed by    1
12    6   to the left of    9
13    6  to the right of    3
14    6  to the right of    7
15    6   to the left of    8
16    6   to the left of   11
17    7   to the left of    1
18    7   to the left of    6
19    7  to the right of   12
20    7  to the right of   10
21    7   to the left of    9
22    7  to the right of    0
23    7               in    4
24    8  to the right of    1
25    8  to the right of    3
26    8  to the right of    6
27    8  to the right of    9
28    8   to the left of   11
29    9   to the left of   11
30    9  to the right of    1
31    9  to the right of    6
32    9  to the right of    3
33    9  to the right of    7
34    9   to the left of    8
35   10   to the left of    7
36   10   to the left of   14
37   10   to the left of   13
38   11         watching    7
39   11  to the right of    8
40   11  to the right of    9
41   11  to the right of    6
42   12   to the left of    7
43   12   to the left of   14
44   12   to the left of   13
45   13  to the right of    0
46   13  to the right of   10
47   13  to the right of   12
48   14  to the right of   10
49   14  to the right of   12