Table: railway_history_2
Columns: builder
type
built
bought
notes

Question: What are the notes for a Type of 0-6-0t?
SQL: SELECT "notes" FROM railway_history_2 WHERE "type" = '0-6-0t'

Question: What is the notes for the vehicle built in 1917?
SQL: SELECT "notes" FROM railway_history_2 WHERE "built" = '1917'