d00 feature_0=1.0 feature_1=0.5
d01 feature_0=1.5 feature_1=0.4
d02 feature_0=1.8 feature_1=0.3
d10 feature_1=0.5 feature_2=1.0
d11 feature_1=0.4 feature_2=2.0
d12 feature_1=0.6 feature_2=1.5
d20 feature_2=0.2 feature_3=1.0
d21 feature_2=0.5 feature_3=2.0
d22 feature_2=0.6 feature_3=3.0