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_37642 ( "Location (State, City)" text, "USN 2013" real, "BW 2013" real, "Forbes 2011" real, "Ec 2013" real, "FT 2011" real, "AE 2011" real, "CNN 2011" real, "BI 2013" real, "ARWU 2012" real )

### Question ###
What is the BW 2013 ranking of Washington, D.C., which has an ARWU 2012 ranking greater than 51?

### Accurate SQL ###

SELECT "BW 2013" FROM table_37642 WHERE "ARWU 2012" > '51' AND "Location (State, City)" = 'washington, d.c.'