CREATE TABLE table_9730 ("Tournament" CLOB, "Surface" CLOB, "Week" CLOB, "Winner" CLOB, "Finalist" CLOB, "Semi finalists" CLOB)

Which Tournament has a Semi finalists of mary pierce elena dementieva?
SELECT "Tournament" FROM table_9730 WHERE "Semi finalists" = 'mary pierce elena dementieva'
SELECT "Tournament" FROM "table_9730" WHERE "Semi finalists" = 'mary pierce elena dementieva'