parlamentarnym

In a sentence

• W wyborach parlamentarnym głosowało wiele osób.

  Many people voted in the parliamentary elections.

  Here, 'parlamentarnym' is used as an adjective describing the type of elections.

• Spotkaliśmy się na konferencji parlamentarnej w Warszawie.

  We met at a parliamentary conference in Warsaw.

  In this case, 'parlamentarnej' is describing the conference as related to the parliament.

• Został wybrany na przedstawiciela w systemie parlamentarnym.

  He was elected as a representative in the parliamentary system.

  Here, 'parlamentarnym' is a descriptive term for the system in which the representative was elected.