Group of people holding umbrellas, while walking in the rain.
The group of people are outside on a sunny day.
The can not be rain and sunny day simultaneously.
exists e2 e1 s1 x1 x2 x3 x4.(n_rain(x4) & ne_org_group(s1) & a_topic(s1) & of(s1,x1) & while(e1,e2) & in(e2,x4) & Actor(e2,x2) & v_walk(e2) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_umbrella(x3) & (x1 = x2) & n_people(x1))
exists s1 s2 x1 x2 x3.(n_group(x1) & on(s1,x3) & n_day(x3) & a_sunny(s2) & Theme(s2,x3) & Theme(s1,x1) & a_outside(s1) & of(x1,x2) & n_people(x2))