A man is speaking at a podium.
A man is giving a speech.
Speaking is a form of a speech.
exists e1 x1 x2.(at(e1,x2) & n_podium(x2) & Actor(e1,x1) & v_speak(e1) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_speech(x2) & n_man(x1))