CREATE TABLE "vessels_of_the_class" (
  "ship" text,
  "launched" real,
  "location" text,
  "speed" text,
  "fate" text
);

Question: What is the average launch date of the vmv-1 vessel in Germany?
SQL: SELECT AVG("launched") FROM "vessels_of_the_class" WHERE "location"='germany' AND "ship"='vmv-1';