A man operating a furnace.
A man puts out the furnace.
either the man is operating the firnace or putting it out
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_operate(e1) & n_furnace(x3) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2.(n_furnace(x2) & a_out(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_put(e1) & n_man(x1))