CREATE TABLE "reactors" (
  "unit" text,
  "type" text,
  "net_power" text,
  "total_power" text,
  "construction_start" text,
  "construction_finish" text,
  "commercial_operation" text,
  "shut_down" text
);

Question: When did the construction of the unit Chinon B1 with net power of 905 MW start?
SQL: SELECT "construction_start" FROM "reactors" WHERE "net_power"='905 MW' AND "unit"='Chinon B1';

Question: What's the total power of the unit whose construction finished on 14.06.1963?
SQL: SELECT "total_power" FROM "reactors" WHERE "construction_finish"='14.06.1963';

Question: How many different values of total power are there for the unit whose construction started on 01.03.1977 and whose commercial operation started on 01.02.1984?
SQL: SELECT COUNT("total_power") FROM "reactors" WHERE "construction_start"='01.03.1977' AND "commercial_operation"='01.02.1984';

Question: What's the shut down state of the unit that's been in commercial operation since 01.02.1984?
SQL: SELECT "shut_down" FROM "reactors" WHERE "commercial_operation"='01.02.1984';

Question: When was the start of the construction of the unit that's been in commercial operation since 04.03.1987?
SQL: SELECT "construction_start" FROM "reactors" WHERE "commercial_operation"='04.03.1987';