What color is the sink the tap is on?
The sink is white.
    src        edge_attr  dst
0     1  to the right of    5
1     2  to the right of    3
2     2  to the right of   10
3     3               on    6
4     3   to the left of    2
5     3  to the right of    4
6     4  to the right of   11
7     4   to the left of    3
8     5   to the left of    1
9     5   to the left of   15
10    5  to the right of   12
11    6  to the right of    9
12    7   to the left of   13
13    8  to the right of   11
14    9   to the left of    6
15   10   to the left of    2
16   11   to the left of    8
17   11   to the left of    4
18   12   to the left of   15
19   12   to the left of    5
20   13  to the right of    7
21   15  to the right of   12
22   15  to the right of    5