A woman walks with another person at night.
A woman is walking at night.
It is important that the woman walks with another person when she walks at night.
exists e1 x1 x2 x3 x4.(n_person(x2) & at(e1,x4) & n_night(x4) & with(e1,x3) & n_person(x3) & -(x3 = x2) & Actor(e1,x1) & v_walk(e1) & n_woman(x1))
exists e1 x1 x2.(at(e1,x2) & n_night(x2) & Actor(e1,x1) & v_walk(e1) & n_woman(x1))