Table: election_results_2006_7
Columns: district
incumbent
party
first_elected
results

Question: Who is the republican Incumbent for Pennsylvania 9?
SQL: SELECT "incumbent" FROM election_results_2006_7 WHERE "party" = 'republican' AND "district" = 'pennsylvania 9'

Question: What are the results for Bill Shuster?
SQL: SELECT "results" FROM election_results_2006_7 WHERE "incumbent" = 'bill shuster'

Question: What is the greatest first elected for Pennsylvania 10?
SQL: SELECT MAX("first_elected") FROM election_results_2006_7 WHERE "district" = 'pennsylvania 10'