Table schema:
CREATE TABLE table_1341549_33 (first_elected VARCHAR, result VARCHAR, incumbent VARCHAR)

Question:  how many first elected with result being re-elected and incumbent being gary ackerman redistricted from the 7th district
SQL: SELECT COUNT(first_elected) FROM table_1341549_33 WHERE result = "Re-elected" AND incumbent = "Gary Ackerman Redistricted from the 7th district"