CREATE TABLE table_5472 ("Corps Name" TEXT, "Number of Finals Appearances" FLOAT, "Year of First Appearance" FLOAT, "Year of Most Recent Appearance" FLOAT, "All Years of Finals Appearances" TEXT)

What is the average year of the most recent appearance of the Boston Crusaders, who had their first appearance after 1976?
SELECT AVG("Year of Most Recent Appearance") FROM table_5472 WHERE "Year of First Appearance" > '1976' AND "Corps Name" = 'boston crusaders'
SELECT AVG("Year of Most Recent Appearance") FROM "table_5472" WHERE "Corps Name" = 'boston crusaders' AND "Year of First Appearance" > '1976'