The category "<n-not_proper_name-np_type_null>" can be expressed as follows:

<n-not_proper_name-np_type_null>

<n-not_mod-kind> of <n-not_mod-not_proper_name-np_type_null>

<n-not_mod-sing-kind> of <n-not_mod-not_proper_name-np_type_null>

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