CREATE TABLE table_52443 ("Year" FLOAT, "Network" TEXT, "Lap-by-lap" TEXT, "Color commentator ( s ) " TEXT, "Pit reporters" TEXT, "Host" TEXT, "Ratings" TEXT, "Viewers" TEXT)

Who was the lap-by-lap broadcaster before 1994 who garnered ratings of 8.0/21?
SELECT "Lap-by-lap" FROM table_52443 WHERE "Year" < '1994' AND "Ratings" = '8.0/21'
SELECT "Lap-by-lap" FROM "table_52443" WHERE "Ratings" = '8.0/21' AND "Year" < '1994'