What is the College of the LB Player with Big Ten Conf.?
CREATE TABLE "notable_undrafted_players" (
  "original_nfl_team" text,
  "player" text,
  "pos" text,
  "college" text,
  "conf" text
);
SELECT "college" FROM "notable_undrafted_players" WHERE "pos"='lb' AND "conf"='big ten';