Which Network has Bill Weber for the Lap-by-lap?
CREATE TABLE "fox_nbc_era_2001_2006" (
  "year" real,
  "network" text,
  "lap_by_lap" text,
  "s_color_commentator" text,
  "pre_race_host" text,
  "ratings" text
);
SELECT "network" FROM "fox_nbc_era_2001_2006" WHERE "lap_by_lap"='bill weber';