*Vertices 4
1 "ArtifIntell" 0.0 0.0 0.0 x_fact 0.602508 y_fact 1.599902
2 "LectNotesArtifInt" 0.0 0.0 0.0 x_fact 7.360365 y_fact 10.800358
3 "LectNotesComputSc" 0.0 0.0 0.0 x_fact 13.397655 y_fact 86.695978
4 "MachLearn" 0.0 0.0 0.0 x_fact 0.354177 y_fact 0.903762
*Matrix 
0.000000 0.681295 0.274845 0.426652 
0.681295 0.000000 0.700162 0.586873 
0.274845 0.700162 0.000000 0.000000 
0.426652 0.586873 0.000000 0.000000