People are checking out CDs on an counter.
The CDs are in clear cases.
Not all CDs are in cases, and not all cases are clear.
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_counter(x3) & a_out(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_check(e1) & n_cd(x2) & n_people(x1))
exists p1 x1.(n_cd(x1) & exists s1 x2.(in(x1,x2) & n_case(x2) & a_clear(s1) & Theme(s1,x2)))