CREATE TABLE table_39332 ("Year" FLOAT, "Record" CLOB, "Regular Season Finish" CLOB, "Playoffs" CLOB, "Avg Attend." FLOAT)

Name the year for american conference semifinals
SELECT "Year" FROM table_39332 WHERE "Playoffs" = 'american conference semifinals'
SELECT "Year" FROM "table_39332" WHERE "Playoffs" = 'american conference semifinals'