A crowd of people watching a motorcycle event.
People are at a car show.
A car show and a motorcycle event are two different (and not the same) activity.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & n_event(x4) & of(x4,x5) & n_motorcycle(x5) & (x2 = x3) & n_people(x2) & n_crowd(x1))
exists p1 x1.(exists x2 x3.(at(x1,x2) & n_show(x2) & of(x2,x3) & n_car(x3)) & n_people(x1))