A man operating a furnace.
A man keeps warm.
Operating a furnace does not imply the man keeps warm.
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 p1 x1.(exists s1.(Theme(s1,x1) & a_warm(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_keep(e1) & n_man(x1))