A man in white talks to a group of other men.
The man talking is a pastor.
The man in white may not be a pastor.
exists s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & to(x2,x3) & of(x3,x4) & -(x4 = x1) & n_man(x1) & n_man(x1) & n_man(x4) & n_group(x3) & n_talk(x2) & a_white(s1) & Theme(s1,x2))
exists e1 p1 x1 x2.(n_man(x1) & exists x3.((x1 = x3) & n_pastor(x3)) & Actor(e1,x2) & v_talking(e1) & (x1 = x2))