1 smiling African American boy.
Nobody is smiling
There can not be nobody smiling if 1 is.
exists s1 s2 s3 x1.(n_boy(x1) & a_.(s3) & Theme(s3,x1) & a_american(s2) & Theme(s2,x1) & a_african(s1) & Theme(s1,x1) & r_smiling(x1) & n_date(x1) & a_date_day_01(x1) & a_date_day_01(x1) & a_topic(x1))
-exists e1 x1.(Actor(e1,x1) & v_smile(e1) & n_person(x1))