A receptionist laughs while conversing on the telephone.
the receptionist was talking on the phone
The receptionist might not have been talking.
exists e2 e1 x1 x2.(n_telephone(x2) & while(e1,e2) & on(e2,x2) & Actor(e2,x1) & v_converse(e2) & Actor(e1,x1) & v_laugh(e1) & n_receptionist(x1))
exists e1 x1 x2.(n_phone(x2) & n_receptionist(x1) & on(e1,x2) & Actor(e1,x1) & v_talk(e1))