Soldiers in uniform holding guns.
Boys are playing with cap guns.
Boys cannot be soldiers. They're not old enough. Playing with cap guns cannot be done while holding a gun in uniform.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_gun(x2) & of(x2,x3) & n_holding(x3) & a_uniform(s1) & Theme(s1,x2) & n_soldier(x1))
exists e1 x1 x2 x3.(with(e1,x2) & n_gun(x2) & of(x2,x3) & n_cap(x3) & Actor(e1,x1) & v_play(e1) & n_boy(x1))