What are the parties listed for Pennsylvania 8?
CREATE TABLE table_28929 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" text,
    "Result" text,
    "Candidates" text
)
SELECT "Party" FROM table_28929 WHERE "District" = 'Pennsylvania 8'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What are the parties listed for Pennsylvania 8? ### Input: CREATE TABLE table_28929 (
    "District" text,
    "Incumbent" text,
    "Party" text,
    "First elected" text,
    "Result" text,
    "Candidates" text
) ### Response: SELECT "Party" FROM table_28929 WHERE "District" = 'Pennsylvania 8'