Table: congress_elections
Columns: district
incumbent
party
first_elected
result
candidates

Question: How many candidates won the election in the district whose incumbent is Bud Shuster?
SQL: SELECT COUNT("candidates") FROM congress_elections WHERE "incumbent" = 'Bud Shuster'

Question: What are the candidates in the district whose incumbent is Gus Yatron?
SQL: SELECT "candidates" FROM congress_elections WHERE "incumbent" = 'Gus Yatron'

Question: What's the winning party in the Pennsylvania 6 district?
SQL: SELECT "party" FROM congress_elections WHERE "district" = 'Pennsylvania 6'