Two people in blue shirts are outside with a bullhorn.
People are wearing blue
"People are wearing blue" is a rephrasing of "People in blue shirts".
exists s1 s2 x1 x2 x3.(with(s2,x3) & n_bullhorn(x3) & Theme(s2,x1) & a_outside(s2) & in(x1,x2) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_blue(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_wear(e1) & n_people(x1))