CREATE TABLE table_51105 ("Owner" CLOB, "Class" CLOB, "Number in class" FLOAT, "Road numbers" CLOB, "Built" CLOB)

Which class has more than 15 people in the class?
SELECT "Class" FROM table_51105 WHERE "Number in class" > '15'
SELECT "Class" FROM "table_51105" WHERE "Number in class" > '15'