Happy children rocking out and smiling.
There are happy children.
They are happy children because they are happy children smiling.
exists e1 e2 s1 s2 s3 x1 x2.(Actor(e2,x2) & v_smile(e2) & n_child(x2) & a_happy(s3) & Theme(s3,x2) & a_out(s2) & Manner(e1,s2) & Actor(e1,x1) & v_rock(e1) & n_child(x1) & a_happy(s1) & Theme(s1,x1))
exists p1 x1 s1 x2.((x1 = x2) & n_child(x2) & a_happy(s1) & Theme(s1,x2))