What is the bed made of?
The bed is made of concrete.
    src        edge_attr  dst
0     1   to the left of   17
1     1  to the right of    9
2     1   to the left of   21
3     1  to the right of   20
4     1  to the right of    3
..  ...              ...  ...
93   22   to the left of   21
94   22  to the right of   20
95   22  to the right of    9
96   22   to the left of   15
97   22  to the right of    6

[98 rows x 3 columns]