CREATE TABLE table_23285 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

When pennsylvania 3 is the district who is the incumbent?
SELECT "Incumbent" FROM table_23285 WHERE "District" = 'Pennsylvania 3'
SELECT "Incumbent" FROM "table_23285" WHERE "District" = 'Pennsylvania 3'