Man is demonstrating to a student.
Man and student together
A student is receiving a demonstration from a man while with him.
exists e1 x1 x2.(to(e1,x2) & n_student(x2) & Actor(e1,x1) & v_demonstrate(e1) & n_man(x1))
exists s1 x1 x2.(a_topic(s1) & subset_of(x2,s1) & r_together(x2) & n_student(x2) & subset_of(x1,s1) & n_man(x1))