When parnell dickinson was the player and the rounds were under 7, what's the highest pick?
CREATE TABLE "nfl_draft" (
  "pick" real,
  "round" real,
  "player" text,
  "position" text,
  "school" text
);
SELECT MAX("pick") FROM "nfl_draft" WHERE "player"='parnell dickinson' AND "round"<7;