People are walking down a sidewalk in the rain with umbrellas.
People are holding umbrellas during a massive down pour.
the rain need not be a massive down pour.
exists e1 s1 x1 x2 x3 x4.(n_rain(x3) & with(e1,x4) & n_umbrella(x4) & in(e1,x3) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_sidewalk(x2) & n_people(x1))
exists e1 p1 s1 x1 x2.(exists e2 x3.(Actor(e2,x3) & v_hold(e2) & n_people(x3)) & Topic(e1,p1) & Actor(e1,x1) & v_pour(e1) & during(x1,x2) & n_massive(x2) & a_down(s1) & Theme(s1,x2) & n_umbrella(x1))