Who is older, the man or the boy?
The man is older than the boy.
    src        edge_attr  dst
0     4   to the left of    6
1     5  to the right of   10
2     5               at   13
3     6  to the right of    4
4     7      standing on    1
5     7          holding   14
6     8               on    9
7    10   to the left of   16
8    10   to the left of    5
9    12  to the right of   16
10   16  to the right of   10
11   16   to the left of   12