Question: What's the lowest diameter when the longitude is 71.1W?
SQL: SELECT MIN("Diameter") FROM "2-16768245-5" WHERE "Longitude" = '71.1W';

Question: What's the longitude for Philae Sulcus in 1997 with a diameter less than 1575.0?
SQL: SELECT "Longitude" FROM "2-16768245-5" WHERE "Diameter" < 1575.0 AND "Year named" = 1997.0 AND "Name" = 'Philae Sulcus';

Question: What is Dardanus Sulcus' lowest diameter?
SQL: SELECT MIN("Diameter") FROM "2-16768245-5" WHERE "Name" = 'Dardanus Sulcus';

Question: How many years is ur sulcus listed with a diameter less than 1145.0?
SQL: SELECT COUNT("Year named") FROM "2-16768245-5" WHERE "Name" = 'ur sulcus' AND "Diameter" < 1145.0;