An elderly gentleman is delivering a talk to an audience.
A man is speaking to an audience.
An elderly gentleman is a man.
exists e1 s1 x1 x2 x3.(to(e1,x3) & n_audience(x3) & Theme(e1,x2) & Actor(e1,x1) & v_deliver(e1) & n_talk(x2) & n_gentleman(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 x1 x2.(to(e1,x2) & n_audience(x2) & Actor(e1,x1) & v_speak(e1) & n_man(x1))