Question: What is the highest NBR number that corresponds to the J class and the road number of 1211?
SQL: SELECT MAX("NBR number") FROM "2-1294235-1" WHERE "Class" = 'J' AND "Road number" = 1211.0;

Question: How many road numbers are before 1922?
SQL: SELECT COUNT("Road number") FROM "2-1294235-1" WHERE "Year" < 1922.0;

Question: Which original operator is in the 25NC class?
SQL: SELECT "Original operator" FROM "2-1294235-1" WHERE "Class" = '25NC';

Question: Which class starts after 1939 and has a road number smaller than 3508?
SQL: SELECT "Class" FROM "2-1294235-1" WHERE "Year" > 1939.0 AND "Road number" < 3508.0;