CREATE TABLE "yankee_class_significant_dates" (
  "num" text,
  "project" text,
  "shipyard" text,
  "laid_down" text,
  "launched" text,
  "commissioned" text,
  "status" text
);

Question: which vessel area was called for on november 30, 1970
SQL: SELECT "shipyard" FROM "yankee_class_significant_dates" WHERE "commissioned"='November 30, 1970';

Question: what project was initially started before september 20, 1968
SQL: SELECT "commissioned" FROM "yankee_class_significant_dates" WHERE "launched"='September 20, 1968';

Question: when was the first start date that actually began on august 6, 1969
SQL: SELECT "launched" FROM "yankee_class_significant_dates" WHERE "commissioned"='August 6, 1969';

Question: where is the boat area that began on november 30, 1970
SQL: SELECT "shipyard" FROM "yankee_class_significant_dates" WHERE "commissioned"='November 30, 1970';