Ground Truth (X <tab> Y means X causes Y)
1	2
1	3
2	4
2	6
3	4
3	5
5	6


Coefficients
[1]= + noise_1
[3]= -1.18408([0]-0.471538)^5 + noise_3
[5]= -1.18909([2]+0.575453)^3 + noise_5
[2]= +1.77921([0]+0.264943)^5 + noise_2
[6]= +1.49389([1]-0.862983)^3 -0.0964889([4]-0.280899)^5 + noise_6
[4]= 0.0494249 * ([1])^2 + noise_4
