Question: What was the cylinder size of this engine that was made with only 88 pieces?
SQL: SELECT "Cylinder size" FROM "1-25695027-1" WHERE "Number built" = '88';

Question: What was the engine class that was built on 1906-08?
SQL: SELECT "Class" FROM "1-25695027-1" WHERE "Years built" = '1906-08';

Question: How many engines were built with a cylinder size of 20 ½” x 26”, firebox is Belpaire and valve gear is from Stephenson?
SQL: SELECT "Number built" FROM "1-25695027-1" WHERE "Cylinder size" = '20 ½” x 26”' AND "Firebox" = 'Belpaire' AND "Valve gear" = 'Stephenson';

Question: This engine with a cylinder size of 20 ½” x 26” and a firebox of Radial-stay was built when?
SQL: SELECT "Years built" FROM "1-25695027-1" WHERE "Cylinder size" = '20 ½” x 26”' AND "Firebox" = 'Radial-stay';

Question: How many types of valves were used on this engine that was built on 1902-05?
SQL: SELECT COUNT("Valves") FROM "1-25695027-1" WHERE "Years built" = '1902-05';