The sky is blue and clear.
The sky is blue on a summer day
Just because the sky is blue and clear does not mean it is a summer day.
exists s1 s2 x1.(n_sky(x1) & Theme(s2,x1) & a_clear(s2) & Theme(s1,x1) & a_blue(s1))
exists s1 x1 x2 x3.(n_sky(x1) & on(s1,x2) & n_day(x2) & of(x2,x3) & n_summer(x3) & Theme(s1,x1) & a_blue(s1))