A police officer with blue outfit and red helmet rides through town.
The helmet is blue.
If the helmet is blue then it is not red
exists s1 s2 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & with(x1,x3) & subset_of(x5,x3) & through(x5,x7) & n_town(x7) & n_ride(x5) & of(x5,x6) & n_helmet(x6) & a_red(s2) & Theme(s2,x5) & subset_of(x4,x3) & n_outfit(x4) & a_blue(s1) & Theme(s1,x4) & n_officer(x1) & of(x1,x2) & n_police(x2))
exists s1 x1.(n_helmet(x1) & Theme(s1,x1) & a_blue(s1))