object of preposition noun type
The object of preposition noun type (or "OPNT") is the noun type of the object of preposition noun of a statement.
For example, in the statement:
person: Kent Ortiz <introduced> person: Agnes Levine [to] person: Marlene Oliver
the noun "person: Marlene Oliver" is the object of preposition noun of the statement.
The noun type of the object of preposition noun ("person: Marlene Oliver") is person.