A dark-haired little boy is very upset.
The boy is smiling
The little boy is either upset or smiling, but not both.
exists s1 s2 s3 x1.(r_very(s3) & Theme(s3,x1) & a_upset(s3) & n_boy(x1) & a_little(s2) & Theme(s2,x1) & a_dark-haired(s1) & Theme(s1,x1))
exists e1 x1.(n_boy(x1) & Actor(e1,x1) & v_smile(e1))