What is the total for guests with a ship name of rv indochina, and a crew smaller than 28?
CREATE TABLE "ships_cruising_in_asia" (
  "ship_name" text,
  "year_built" real,
  "length" text,
  "crew" real,
  "guests" real,
  "staterooms" real,
  "comments" text
);
SELECT COUNT("guests") FROM "ships_cruising_in_asia" WHERE "ship_name"='rv indochina' AND "crew"<28;