Warning: unknown attribute key in GraphML file, ignoring attribute
The directed graph:
Vertices: 6
Edges: 7
Directed: 0
0 1
0 2
1 3
2 3
2 4
3 5
4 5
Warning: unknown attribute key in GraphML file, ignoring attribute
The undirected graph:
Vertices: 6
Edges: 7
Directed: 0
0 1
0 2
1 3
2 3
2 4
3 5
4 5