This is the 1109th most frequent Polish word.
parlamentarnych
"Parlamentarnych" means "parliamentary" in English.
The word 'parlamentarnych' is used here as a genitive plural attribute describing the candidates as being related to parliamentary elections.
Wybory parlamentarnych kandydatów odbyły się w zeszłą sobotę.
The election of parliamentary candidates took place last Saturday.
The word 'parlamentarnych' functions here as a genitive plural adjective referring to debates associated with parliament.
Podczas debat parlamentarnych omawiano nowe przepisy.
During parliamentary debates, new regulations were discussed.
This sentence uses 'parlamentarnych' as a genitive plural adjective to describe the factions in relation to their parliamentary association.