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_13342 ( "Township" text, "County" text, "Pop. (2010)" real, "Land ( sqmi )" real, "Water (sqmi)" real, "Latitude" real, "Longitude" real, "GEO ID" real, "ANSI code" real )

### Question ###
what is the average water sqmi with a population (2010) more than 47 in the Brenna Township with Longitude less than -97.171507

### Accurate SQL ###

SELECT AVG("Water (sqmi)") FROM table_13342 WHERE "Pop. (2010)" > '47' AND "Township" = 'brenna' AND "Longitude" < '-97.171507'