What is the sum of Rank with a build year earlier than 2007 for the howard johnson hotel bucharest?
CREATE TABLE "completed_buildings" (
  "rank" real,
  "building" text,
  "city" text,
  "height_m_ft" text,
  "built" real
);
SELECT SUM("rank") FROM "completed_buildings" WHERE "built"<2007 AND "building"='howard johnson hotel bucharest';