CREATE TABLE table_21683 ("School" CLOB, "Years of Participation" CLOB, "OCC Championships" FLOAT, "Last OCC Championship" CLOB, "Last Outright OCC Championship" CLOB)

What are the years of participation for central crossing school?
SELECT "Years of Participation" FROM table_21683 WHERE "School" = 'Central Crossing'
SELECT "Years of Participation" FROM "table_21683" WHERE "School" = 'Central Crossing'