What is the can filled with?
The can is filled with tissues.
    src        edge_attr  dst
0     1  to the right of    2
1     1      filled with    5
2     1  to the right of    6
3     2  to the right of    3
4     2   to the left of    1
5     2   to the left of    5
6     3   to the left of    2
7     5               in    1
8     5  to the right of    2
9     5  to the right of    6
10    6   to the left of    5
11    6   to the left of    1
12    7               in    1