a crowd of people are at the top of steps in front of a white building.
The people are at a rave.
Raves do not occur at the top of steps.
exists p1 x1 x2 x3.(n_top(x3) & exists s1 x4 x5 x6.(at(x1,x3) & of(x3,x4) & in(x4,x5) & of(x5,x6) & n_building(x6) & a_white(s1) & Theme(s1,x6) & n_front(x5) & n_step(x4)) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists p1 x1.(n_people(x1) & exists x2.(at(x1,x2) & n_rave(x2)))