CREATE TABLE table_39884 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" CLOB)

Who did the Texans play when there were 70,724 people in attendance?
SELECT "Opponent" FROM table_39884 WHERE "Attendance" = '70,724'
SELECT "Opponent" FROM "table_39884" WHERE "Attendance" = '70,724'