*Vertices 4
1 "ArtifIntell" 0.0 0.0 0.0 x_fact 0.357452 y_fact 1.234835
2 "LectNotesArtifInt" 0.0 0.0 0.0 x_fact 9.896736 y_fact 14.254766
3 "LectNotesComputSc" 0.0 0.0 0.0 x_fact 11.030474 y_fact 84.113229
4 "MachLearn" 0.0 0.0 0.0 x_fact 0.104708 y_fact 0.397169
*Matrix 
0.000000 0.532846 0.217907 0.247077 
0.532846 0.000000 0.783476 0.401123 
0.217907 0.783476 0.000000 0.000000 
0.247077 0.401123 0.000000 0.000000