Test

1  B        2001
2  A,B      2001
3  B,C      2001
4  A,B,C    2002
5  C,D      2002
6  A,D,E    2002
7  A,C      2003
8  A,B      2003
9  B,E      2003

test.clu

*vertices 9
 2001
 2001
 2001
 2002
 2002
 2002
 2003
 2003
 2003

test.net - WAn

*Arcs
 1 11 1
 2 10 0.5
 2 11 0.5
 3 11 0.5
 3 12 0.5
 4 10 0.33
 4 11 0.33
 4 12 0.33
 5 12 0.5
 5 13 0.5
 6 10 0.33
 6 13 0.33
 6 14 0.33
 7 10 0.5
 7 12 0.5
 8 10 0.5
 8 11 0.5
 9 11 0.5
 9 14 0.5