1,2,knows,0.5
4,3,knows,0.5
5,12,knows,0.5
3,2,knows,0.5
10,4,knows,0.5
5,3,knows,0.5
6,10,knows,0.5
6,5,knows,0.5
2,4,knows,0.5
5,9,knows,0.5
9,5,knows,0.5
10,2,knows,0.5
1,8,knows,0.5
3,5,knows,0.5
3,1,knows,0.5
1,7,knows,0.5
7,4,knows,0.5
10,15,knows,0.5