1829 Pennsylvania's 8th congressional district special election
{'<entity_0>': "1829 Pennsylvania's 8th congressional district special election", '<entity_1>': '1829'}
[["1829 Pennsylvania's 8th congressional district special election", 'point in time', '1829']]
A special election was held in <entity_0> on <entity_1> to fill two vacancies in Pennsylvania's congressional delegation before the first session of the 21st Congress.
['special election to the United States House of Representatives']