The professor reading the names of students who have passed the exam.
A pastor is reading a sermon.
A professor is not a pastor.
exists e1 e2 x1 x2 x3 x4 x5 x6.(n_exam(x6) & n_name(x3) & n_professor(x1) & a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_read(e2) & of(x3,x4) & Theme(e1,x6) & Actor(e1,x5) & v_pass(e1) & (x4 = x5) & n_student(x4) & (x1 = x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_sermon(x2) & n_pastor(x1))