Is there a bench made of concrete?
Yes, there is a bench that is made of concrete.
    src        edge_attr  dst
0     0  to the right of   14
1     0  to the right of    4
2     2  to the right of   13
3     3      standing on   12
4     3   to the left of    6
5     4  to the right of   13
6     4   to the left of    0
7     5   to the left of   10
8     5   to the left of    7
9     6  to the right of    3
10    7  to the right of    8
11    7  to the right of    5
12    8   to the left of    7
13   10  to the right of    5
14   11  to the right of   16
15   13   to the left of    4
16   13   to the left of    2
17   14   to the left of    0
18   16   to the left of   11