CREATE TABLE table_5992 ("Player" CLOB, "Team" CLOB, "Date" CLOB, "Opponent" CLOB, "Venue" CLOB)

Which team did the Boston Beaneaters host at the South End Grounds?
SELECT "Opponent" FROM table_5992 WHERE "Venue" = 'south end grounds'
SELECT "Opponent" FROM "table_5992" WHERE "Venue" = 'south end grounds'