Many people are gathered in a crowded building.
People are waiting outside for a concert.
You can't be gathered in a crowded building and be waiting outside at the same time.
exists e1 s1 x1 x2.(in(e1,x2) & n_building(x2) & a_crowded(s1) & Theme(s1,x2) & Theme(e1,x1) & v_gather(e1) & n_people(x1) & n_quantity(x1))
exists e1 s1 x1 x2.(for(e1,x2) & n_concert(x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_wait(e1) & n_people(x1))