What are the vases filled with?
The vases are filled with water.
    src        edge_attr  dst
0     1               on    6
1     1          holding   11
2     1      filled with    5
3     2   to the left of    3
4     2   to the left of    8
5     3  to the right of   11
6     3  to the right of    2
7     3  to the right of    8
8     3  to the right of    7
9     3  to the right of    4
10    4   to the left of    3
11    4   to the left of    7
12    7  to the right of    4
13    7   to the left of    3
14    8   to the left of    3
15    8  to the right of   11
16    8  to the right of    2
17    9               on    2
18   11   to the left of    3
19   11   to the left of    8