input: Piotr_Hallmann | birthPlace | Gdynia,_Poland Gdynia,_Poland | leaderTitle | Mayor
target: Piotr Hallmann was born in Gdynia, Poland which is led by the mayor.
references: Piotr Hallmann was born in Gdynia, Poland which is led by the mayor. Piotr Hallmann was born in Gdynia, Poland, which has a mayor as one of its leaders. Piotr Hallmann was born in Gdynia, Poland which is under the leadership of mayor.