Two nurses laughing over a container.
Two nurses laugh at work.
Laughing is another tense of laugh.
exists e1 x1 x2 x3.(a_topic(x1) & over(e1,x3) & n_container(x3) & Actor(e1,x2) & v_laugh(e1) & (x1 = x2) & n_nurse(x1) & card_eq_2(x1))
exists x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_work(x3) & n_laugh(x1) & of(x1,x2) & n_nurse(x2) & card_eq_2(x1))