Another error is underlined that ga-case of "�� (transport by air)" is identified as "�� (reason)", because "��" is only a phrase dependent on "� �".
global improved the errors as � role(5, 6, ga), role(5, 4, wo), role(8, 6, ga), role(8, 10, wo), role(11, 6, ga), role(11, 10, wo) � .