Three men observe a specimen under a microscope.
Scientists are smoking cigarettes
Scientists would not smoke cigarettes while they observe a specimen.
exists e1 x1 x2 x3.(under(e1,x3) & n_microscope(x3) & Theme(e1,x2) & Actor(e1,x1) & v_observe(e1) & n_specimen(x2) & n_man(x1) & card_eq_3(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_smoke(e1) & n_cigarette(x2) & n_scientist(x1))