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_50751 ( "2010 ARWU Rankings" text, "2010 QS World Rankings" text, "2010 QS Asian Rankings" text, "2010 eduniversal Rankings" text, "2009 QS Asian Rankings: Int\u2019l faculty review" text, "2009 QS Asian Rankings: Int\u2019l student review" real, "2000 Singapore \u201cAsiaweek\u201d Rankings" text, "University" text, "Local" text, "Median ranks" real )

### Question ###
What's the int'l student review that has the 2010 QS Rank of none?

### Accurate SQL ###

SELECT SUM("2009 QS Asian Rankings: Int\u2019l student review") FROM table_50751 WHERE "2010 QS Asian Rankings" = 'none'