People are having some kind of a day fair.
People are at the fair.
People are at the fair, a day fair to be more exact.
exists e1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & of(x2,x3) & n_fair(x3) & of(x3,x4) & n_day(x4) & n_kind(x2) & n_people(x1))
exists p1 x1 x2.(n_fair(x2) & at(x1,x2) & n_people(x1))