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In our model we introduce four chiral representations, $({\\bf 1},{\\bf 2})$, $({\\bf 2},{\\bf 1})$, $({\\bf 2},{\\bf 3})$ and $({\\bf 3},{\\bf 2})$ under ${\\rm SU}(2)_{\\rm L} \\otimes {\\rm SU}(2)_{\\rm R}$ symmetry. We determine the model parameters by fitting them to available experimental values of masses, widths and the axial charge of $N(939)$ together with the axial charges of $N(1535)$ and $N(1650)$ by lattice analyses. 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