What is the 1st ship delivery date of 6 ways?
CREATE TABLE "yards_on_the_west_coast" (
  "yard_name" text,
  "location_city_state" text,
  "1st_ship_delivery_date" text,
  "total_number_of_ways" text,
  "total_vessels_built" text
);
SELECT "1st_ship_delivery_date" FROM "yards_on_the_west_coast" WHERE "total_number_of_ways"='6 ways';