Three men observe a specimen under a microscope.
Some people working
Three men are people and when they observe a specimen under a microscope, they are working.
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.(a_topic(x1) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_people(x1))