Laura Bush speaking at a conference on global literacy.
Laura Bush is speaking about farming.
Laura Bush cannot be speaking about global literacy while she is speaking about farming.
exists s1 x1 x2 x3 x4 x5.(a_topic(x1) & at(x1,x4) & on(x4,x5) & n_literacy(x5) & a_global(s1) & Theme(s1,x5) & n_conference(x4) & n_speaking(x1) & (x1 = x3) & ne_per_bush(x3) & (x1 = x2) & ne_per_laura(x2))
exists e1 s1 x1 x2 x3.(ne_per_bush(x1) & (x1 = x2) & ne_per_laura(x2) & Theme(e1,x3) & Actor(e1,x1) & v_speak(e1) & n_farming(x3) & a_about(s1) & Theme(s1,x3))