CREATE TABLE table_1341549_33 (first_elected VARCHAR(255), result VARCHAR(255), incumbent VARCHAR(255))
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"