A group of onlookers watching a few teens in blue shirts.
The teens are wearing green shirts
There can either be teens in blue shirts or in green shirts.
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 e1 s1 x1 x2.(n_teens(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_shirt(x2) & a_green(s1) & Theme(s1,x2))