A man is singing into a microphone.
A man talking at a business meeting.
Singing and talking are two different actions.
exists e1 x1 x2.(into(e1,x2) & n_microphone(x2) & Actor(e1,x1) & v_sing(e1) & n_man(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x3) & n_meeting(x3) & of(x3,x4) & n_business(x4) & Actor(e1,x2) & v_talk(e1) & (x1 = x2) & n_man(x1))