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_58943 ( "Tie no" text, "Home team" text, "Score" text, "Away team" text, "Attendance" text )

### Question ###
Who was the away team that played Northampton Town at home with a tie number of replay?

### Accurate SQL ###

SELECT "Away team" FROM table_58943 WHERE "Tie no" = 'replay' AND "Home team" = 'northampton town'