three people wearing mask sitting down
Three people wearing clown masks before the parade.
The masks do not have to be clown masks. And the people can sit down anywhere, not necessarily a parade.
exists e1 e2 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x4) & v_sit(e1) & (x3 = x4) & n_mask(x3) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists e1 s1 x1 x2 x3 x4.(n_parade(x4) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & before(x3,x4) & n_mask(x3) & a_clown(s1) & Theme(s1,x3) & (x1 = x2) & n_people(x1) & card_eq_3(x1))