CREATE TABLE table_204_495 (id NUMBER, "date" CLOB, "opponent" CLOB, "venue" CLOB, "result" CLOB, "attendance" NUMBER, "scorers" CLOB)

what 's the number of people who attended the chelsea game in 29 august 1987 ?
SELECT "attendance" FROM table_204_495 WHERE "opponent" = 'chelsea' AND "date" = '29 august 1987'
SELECT "attendance" FROM "table_204_495" WHERE "date" = '29 august 1987' AND "opponent" = 'chelsea'