A couple of women walk down the street doing window shopping.
Three robbers case their target
A couple of people is not the same as three people. Walking and casing a target are different activities.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_street(x3) & down(e1,x3) & Theme(e2,x5) & Actor(e2,x4) & v_do(e2) & n_shopping(x5) & of(x5,x6) & n_window(x6) & (x3 = x4) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_woman(x2) & n_couple(x1))
exists s1 x1 x2 x3.(n_target(x1) & a_their(s1) & Theme(s1,x1) & of(x1,x3) & n_case(x3) & of(x1,x2) & n_robber(x2) & card_eq_3(x1) & a_topic(x1))