Two nurses laughing over a container.
Nurses laughing and conversing about a patient.
It cannot be inferred that the nurses are conversing about a patient.
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 e2 e1 x1 x2 x3 x4.(about(e2,x4) & n_patient(x4) & Actor(e2,x3) & v_converse(e2) & n_nurse(x3) & Theme(e1,x2) & Actor(e1,x1) & v_laugh(e1) & n_patient(x2) & n_nurse(x1))