CREATE TABLE "l_class_locomotive_fleet_summary" (
  "secr_no" real,
  "sr_no" real,
  "br_no" real,
  "builder" text,
  "date_delivered" text,
  "date_withdrawn" text
);

Question: What is the withdraw date for secr no. 771?
SQL: SELECT "date_withdrawn" FROM "l_class_locomotive_fleet_summary" WHERE "secr_no"=771;

Question: Who is the builder for br no. 31779?
SQL: SELECT "builder" FROM "l_class_locomotive_fleet_summary" WHERE "br_no"=31779;