CREATE TABLE table_26171 ("Warship" CLOB, "tons  (  L.ton  ) " FLOAT, "Horse- power" FLOAT, "Speed  (  Knots  ) " CLOB, "Armour  ( Inch ) " CLOB, "Main Artillery" CLOB, "Built Year" FLOAT)

What's Blanco Encalada's main artillery?
SELECT "Main Artillery" FROM table_26171 WHERE "Warship" = 'Blanco Encalada'
SELECT "Main Artillery" FROM "table_26171" WHERE "Warship" = 'Blanco Encalada'