German citizens participate in a parade.
People participate in a parade.
German citizens who are people participate in a parade.
exists e1 s1 x1 x2.(in(e1,x2) & n_parade(x2) & Actor(e1,x1) & v_participate(e1) & n_citizen(x1) & a_german(s1) & Theme(s1,x1))
exists e1 x1 x2.(in(e1,x2) & n_parade(x2) & Actor(e1,x1) & v_participate(e1) & n_people(x1))