CREATE TABLE "aircraft" (
  "number" real,
  "registration" text,
  "first_flew" text,
  "last_flew" text,
  "flying_hours" real,
  "location" text
);

Question: on 19 april 1985 how many of number last flew
SQL: SELECT COUNT("number") FROM "aircraft" WHERE "last_flew"='19 April 1985';

Question: what is the registration located on 31 january 1975 where first flew?
SQL: SELECT "registration" FROM "aircraft" WHERE "first_flew"='31 January 1975';

Question: at what location is the last flew on 11 june 2000
SQL: SELECT "location" FROM "aircraft" WHERE "last_flew"='11 June 2000';

Question: how many number is located at registration f-bvff?
SQL: SELECT COUNT("number") FROM "aircraft" WHERE "registration"='F-BVFF';