People are sitting and drinking wine at tables.
The wine is cheap.
Not all wine is cheap.
exists e1 e2 x1 x2 x3 x4.(at(e2,x4) & n_table(x4) & Time(e2,x3) & n_wine(x3) & Actor(e2,x2) & v_drink(e2) & n_people(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists s1 x1.(n_wine(x1) & Theme(s1,x1) & a_cheap(s1))