A group of onlookers watching a few teens in blue shirts.
The teens were all under twenty
Teens are always under twenty.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & in(x4,x5) & n_shirt(x5) & a_blue(s2) & Theme(s2,x5) & n_teens(x4) & a_few(s1) & Theme(s1,x4) & (x1 = x3) & of(x1,x2) & n_onlooker(x2) & n_group(x1))
exists p1 x1.(n_teens(x1) & exists x2.(r_all(x1) & under(x1,x2) & n_thing(x2) & card_eq_20(x2)))