Question: Which Diameter (km) has a Name of alma-merghen planitia, and a Year named smaller than 1997?
SQL: SELECT MAX("Diameter (km)") FROM "2-16799784-7" WHERE "Name" = 'alma-merghen planitia' AND "Year named" < 1997.0;

Question: Which Longitude has a Latitude of 73.0S, and a Name of Aibarchin Planitia?
SQL: SELECT "Longitude" FROM "2-16799784-7" WHERE "Latitude" = '73.0S' AND "Name" = 'Aibarchin Planitia';

Question: Which Year named has a Name of nuptadi planitia, and a Diameter (km) larger than 1200.0?
SQL: SELECT MIN("Year named") FROM "2-16799784-7" WHERE "Name" = 'nuptadi planitia' AND "Diameter (km)" > 1200.0;

Question: Which Latitude has a Year named smaller than 1997, and a Name of Aino Planitia?
SQL: SELECT "Latitude" FROM "2-16799784-7" WHERE "Year named" < 1997.0 AND "Name" = 'Aino Planitia';