A man is speaking at a podium.
A man is fixing the microphone at the podium.
The man can be either speaking or fixing the microphone
exists e1 x1 x2.(at(e1,x2) & n_podium(x2) & Actor(e1,x1) & v_speak(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_podium(x3) & n_microphone(x2) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_fix(e1) & n_man(x1))