in 2007, what is the avg finish that had a start less than 1?
CREATE TABLE "nascar_sprint_cup_series" (
  "year" real,
  "starts" real,
  "wins" real,
  "top_5" real,
  "top_10" real,
  "poles" real,
  "avg_start" real,
  "avg_finish" real,
  "winnings" text,
  "position" text
);
SELECT SUM("avg_finish") FROM "nascar_sprint_cup_series" WHERE "year"=2007 AND "starts"<1;