A man prepares morning coffee in a steel mug.
A man vacuums the floor.
A man who prepares coffee can't be the same man who vacuums the floor at the same time.
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1) & in(x2,x4) & n_mug(x4) & of(x4,x5) & n_steel(x5) & n_coffee(x2) & of(x2,x3) & n_morning(x3) & n_man(x1))
exists e1 x1 x2.(n_floor(x2) & Theme(e1,x2) & Actor(e1,x1) & v_vacuum(e1) & n_man(x1))