CREATE TABLE table_name_87 (year VARCHAR, weight_class VARCHAR, date VARCHAR)

How many years were lightweight class on february 28, 2009?
SELECT COUNT(year) FROM table_name_87 WHERE weight_class = "lightweight" AND date = "february 28, 2009"
SELECT COUNT("year") FROM "table_name_87" WHERE "date" = "february 28, 2009" AND "lightweight" = "weight_class"