Overlapping Borrels:

Instance:

10
2
6, 4
3
3, 1, 3, 2, 3, 7, 2, 9, 9, 1
1, 7,10, 4
3, 1, 2, 1, 1, 4, 2, 1,10,2

Solution:

1, 5
1, 2
3, 4
9
7, 8, 9,10
1
3, 4
9,10
3