A man is talking into a mic while a woman looks at a book beside him and a kid watches them.
A politician is greeting the press.
The man is not definitely a politician.  Further, the only audience we can tell for sure exists from the first sentence is a kid, so we do not know the press is there.
exists e1 p1 x1 x2.(exists e2 e3 x3 x4 x5.(Theme(e3,x1) & Actor(e3,x5) & v_watch(e3) & n_kid(x5) & at(e2,x4) & beside(x4,x1) & n_book(x4) & Actor(e2,x3) & v_look(e2) & n_woman(x3)) & n_thing(x1) & n_male(x1) & while(e1,p1) & into(e1,x2) & n_mic(x2) & Actor(e1,x1) & v_talk(e1) & n_man(x1))
exists e1 x1 x2.(n_press(x2) & Theme(e1,x2) & Actor(e1,x1) & v_greet(e1) & n_politician(x1))