The people dressed in all white are having a good time.
The group of people wearing black overalls are crying in sadness.
The people crying in sadness can not have a good time.
exists e2 e1 s1 x1 x2 x3.(n_people(x1) & Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & n_time(x3) & a_good(s1) & Theme(s1,x3) & all x4.(n_white(x4) -> in(e1,x4)) & Theme(e1,x2) & v_dress(e1) & (x1 = x2))
exists e2 e1 s1 x1 x2 x3 x4 x5.(n_group(x1) & in(e2,x5) & n_sadness(x5) & Actor(e2,x1) & v_cry(e2) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_overalls(x4) & a_black(s1) & Theme(s1,x4) & (x2 = x3) & n_people(x2))