CREATE TABLE "ships_of_the_great_eastern_railway" (
  "ships_name" text,
  "entered_service" text,
  "ended_service" text,
  "gross_tonnage" real,
  "type_of_vessel" text
);

Question: What was the gross tonnage of the ship that ended service in 1866?
SQL: SELECT "gross_tonnage" FROM "ships_of_the_great_eastern_railway" WHERE "ended_service"='1866';

Question: What is the minimum gross tonnage of the Munich? 
SQL: SELECT MIN("gross_tonnage") FROM "ships_of_the_great_eastern_railway" WHERE "ships_name"='Munich';