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_13303 ( "Period" text, "Internet Explorer" text, "Firefox" text, "Safari" text, "Opera" text, "Netscape" text, "Other Mozilla" text )

### Question ###
What percentage of users were using Netscape during the period in which 63.67% were using Internet Explorer?

### Accurate SQL ###

SELECT "Netscape" FROM table_13303 WHERE "Internet Explorer" = '63.67%'