Question: who is the incumbent with candidates being Bud Shuster (R) Unopposed
SQL: SELECT "Incumbent" FROM "1-1341586-39" WHERE "Candidates" = 'Bud Shuster (R) Unopposed';

Question: who is the incumbent with candidates being Tom Ridge (R) 80.9% Joylyn Blackwell (D) 19.1%
SQL: SELECT "Incumbent" FROM "1-1341586-39" WHERE "Candidates" = 'Tom Ridge (R) 80.9% Joylyn Blackwell (D) 19.1%';

Question: what's district with candidates being Curt Weldon (R) 61.3% Bill Spingler (D) 38.7%
SQL: SELECT "District" FROM "1-1341586-39" WHERE "Candidates" = 'Curt Weldon (R) 61.3% Bill Spingler (D) 38.7%';

Question: what's party with district being Pennsylvania 21
SQL: SELECT "Party" FROM "1-1341586-39" WHERE "District" = 'Pennsylvania 21';

Question: what is the maximum first elected with incumbent being Gus Yatron
SQL: SELECT MAX("First elected") FROM "1-1341586-39" WHERE "Incumbent" = 'Gus Yatron';

Question: what's the district with first elected being 1972
SQL: SELECT "District" FROM "1-1341586-39" WHERE "First elected" = 1972.0;