Question: What was the diameter of the feature found in 1997?
SQL: SELECT "Diameter (km)" FROM "1-16799784-3" WHERE "Year named" = 1997.0;

Question: At a latitude of 67.5N, what is the diameter?
SQL: SELECT "Diameter (km)" FROM "1-16799784-3" WHERE "Latitude" = '67.5N';

Question: What is the latitude of Vaidilute Rupes?
SQL: SELECT "Latitude" FROM "1-16799784-3" WHERE "Name" = 'Vaidilute Rupes';

Question: At a latitude of 71.1E, what is the feature's name origin?
SQL: SELECT "Name origin" FROM "1-16799784-3" WHERE "Longitude" = '71.1E';

Question: At a longitude of 109.9E, how many features were found?
SQL: SELECT COUNT("Diameter (km)") FROM "1-16799784-3" WHERE "Longitude" = '109.9E';

Question: At a longitude of 321.9E, what is the latitude of the features found?
SQL: SELECT "Latitude" FROM "1-16799784-3" WHERE "Longitude" = '321.9E';