Two people walk in the rain with umbrellas.
Two people walk in the rain with green umbrellas.
We don't know what color the umbrellas were, they could be anything other than green.
exists e1 x1 x2 x3 x4.(n_rain(x3) & a_topic(x1) & in(e1,x3) & with(x3,x4) & n_umbrella(x4) & Theme(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4.(n_rain(x3) & a_topic(x1) & in(e1,x3) & with(x3,x4) & n_umbrella(x4) & a_green(s1) & Theme(s1,x4) & Theme(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))