Table schema:
CREATE TABLE table_name_38 (year_of_first_appearance VARCHAR, corps_name VARCHAR, number_of_finals_appearances VARCHAR)

Question: What is the year of the first appearance of the Black Knights, who had less than 1 finals appearances?
SQL: SELECT COUNT(year_of_first_appearance) FROM table_name_38 WHERE corps_name = "black knights" AND number_of_finals_appearances < 1