CREATE TABLE "singles" (
  "tournament" text,
  "surface" text,
  "week" text,
  "winner" text,
  "finalist" text,
  "semi_finalists" text
);

Question: Which Semi finalists had a Week of may 15?
SQL: SELECT "semi_finalists" FROM "singles" WHERE "week"='may 15';

Question: Which Finalist has a Semi finalists of monica seles conchita martínez?
SQL: SELECT "finalist" FROM "singles" WHERE "semi_finalists"='monica seles conchita martínez';

Question: Which Tournament has a Semi finalists of monica seles sandrine testud?
SQL: SELECT "tournament" FROM "singles" WHERE "semi_finalists"='monica seles sandrine testud';

Question: Which Surface has a Semi finalists of conchita martínez arantxa sánchez?
SQL: SELECT "surface" FROM "singles" WHERE "semi_finalists"='conchita martínez arantxa sánchez';

Question: Which Tournament has a Semi finalists of mary pierce elena dementieva?
SQL: SELECT "tournament" FROM "singles" WHERE "semi_finalists"='mary pierce elena dementieva';

Question: Which Tournament has a Semi finalists of martina hingis joannette kruger?
SQL: SELECT "tournament" FROM "singles" WHERE "semi_finalists"='martina hingis joannette kruger';