Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_18 ( sponsor_s_ VARCHAR, _number_of_cosponsors VARCHAR, date_introduced VARCHAR )

### Question ###
Who was the sponsor for the bill introduced February 28, 2005 with cosponsors less than 200?

### Accurate SQL ###

SELECT sponsor_s_ FROM table_name_18 WHERE _number_of_cosponsors < 200 AND date_introduced = "february 28, 2005"