Question: Which Semi finalists had a Week of May 15?
SQL: SELECT "Semi finalists" FROM "2-16871290-1" WHERE "Week" = 'May 15';

Question: Which Finalist has a Semi finalists of Monica Seles Conchita Martínez?
SQL: SELECT "Finalist" FROM "2-16871290-1" WHERE "Semi finalists" = 'Monica Seles Conchita Martínez';

Question: Which Tournament has a Semi finalists of Monica Seles Sandrine Testud?
SQL: SELECT "Tournament" FROM "2-16871290-1" WHERE "Semi finalists" = 'Monica Seles Sandrine Testud';

Question: Which Surface has a Semi finalists of Conchita Martínez Arantxa Sánchez?
SQL: SELECT "Surface" FROM "2-16871290-1" WHERE "Semi finalists" = 'Conchita Martínez Arantxa Sánchez';

Question: Which Tournament has a Semi finalists of Mary Pierce Elena Dementieva?
SQL: SELECT "Tournament" FROM "2-16871290-1" WHERE "Semi finalists" = 'Mary Pierce Elena Dementieva';

Question: Which Tournament has a Semi finalists of Martina Hingis Joannette Kruger?
SQL: SELECT "Tournament" FROM "2-16871290-1" WHERE "Semi finalists" = 'Martina Hingis Joannette Kruger';