CREATE TABLE table_name_95 (category VARCHAR, award VARCHAR, result VARCHAR, year VARCHAR)

Which category won the Sundance Film Festival award in 1998?
SELECT category FROM table_name_95 WHERE result = "won" AND year = 1998 AND award = "sundance film festival"
SELECT "category" FROM "table_name_95" WHERE "award" = "sundance film festival" AND "result" = "won" AND "year" = 1998