A pilot is leaving a home.
A pilot is sitting on a toilet
A pilot can not be leaving a home at the same time he is sitting on a toilet
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_leave(e1) & n_home(x2) & n_pilot(x1))
exists e1 x1 x2.(on(e1,x2) & n_toilet(x2) & Actor(e1,x1) & v_sit(e1) & n_pilot(x1))