Men cleaning the ceiling in a museum.
Men cleaning the ceiling before the event at the museum.
There is no mention of an event at the museum. The men might just be cleaning anytime. Or it might be during the event.
exists e1 x1 x2 x3 x4.(n_ceiling(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_clean(e1) & in(x3,x4) & n_museum(x4) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3 x4 x5.(n_museum(x5) & n_event(x4) & n_ceiling(x3) & a_topic(x1) & at(e1,x5) & before(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_clean(e1) & (x1 = x2) & n_man(x1))