CREATE TABLE table_name_52 (diameter__km_ NUMBER, longitude VARCHAR2, year_named VARCHAR2)

What is the Diameter (km) of the Valle with a Longitude of 152.5e named before 1997?
SELECT MAX(diameter__km_) FROM table_name_52 WHERE longitude = "152.5e" AND year_named < 1997
SELECT MAX("diameter__km_") FROM "table_name_52" WHERE "152.5e" = "longitude" AND "year_named" < 1997