Table: palatine_locomotives
Columns: class
railway_number_s
quantity
year_s_of_manufacture
axle_arrangement_uic

Question: What is the railway number of t 4 ii class?
SQL: SELECT "railway_number_s" FROM palatine_locomotives WHERE "class" = 't 4 ii'

Question: What year was the b n2t axle arrangement, which has a quantity of 31, manufactured?
SQL: SELECT "year_s_of_manufacture" FROM palatine_locomotives WHERE "quantity" = 31 AND "axle_arrangement_uic" = 'b n2t'