A class full of students.
The class is on a trampoline
The class is either full of students or is on a trampoline.
exists s1 x1 x2 x3.(a_topic(x1) & of(s1,x3) & n_student(x3) & Theme(s1,x2) & a_full(s1) & (x1 = x2) & n_class(x1))
exists p1 x1.(n_class(x1) & exists x2.(on(x1,x2) & n_trampoline(x2)))