A speaker is giving a speech at a formal event.
There is a speaker up on the stage.
speaker is giving a speech simply means a speaker up on the stage
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_event(x3) & a_formal(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & n_speech(x2) & n_speaker(x1))
exists p1 x1 x3.(n_stage(x3) & exists x2.((x1 = x2) & n_up(x2) & on(x2,x3) & n_speaker(x2)))