Ballerinas dancing on a large stage under blue spotlights.
Ballerinas performing in front of a large crowd.
Just because Ballerinas are dancing doesn't mean that there is a large crowd.
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & under(x1,x4) & n_spotlight(x4) & a_blue(s2) & Theme(s2,x4) & on(x1,x3) & n_stage(x3) & a_large(s1) & Theme(s1,x3) & n_dancing(x1) & (x1 = x2) & ne_nam_ballerinas(x2))
exists e1 s1 x1 x2 x3.(ne_nam_ballerinas(x1) & in(e1,x2) & of(x2,x3) & n_crowd(x3) & a_large(s1) & Theme(s1,x3) & n_front(x2) & Actor(e1,x1) & v_perform(e1))