CREATE TABLE "table1_29302781_12" (
  "week_of" text,
  "tournament" text,
  "champion" text,
  "runner_up" text,
  "semifinalists" text,
  "quarterfinalists" text
);

Question: In the week of what was the runner-up Pat Du Pré?
SQL: SELECT "week_of" FROM "table1_29302781_12" WHERE "runner_up"='Pat Du Pré';

Question: Who were the semifinalists when the runner-up was Peter Feigl?
SQL: SELECT "semifinalists" FROM "table1_29302781_12" WHERE "runner_up"='Peter Feigl';

Question: Who were the semifinalists when the runner-up was Pat Du Pré?
SQL: SELECT "semifinalists" FROM "table1_29302781_12" WHERE "runner_up"='Pat Du Pré';

Question: Who were the semifinalists in the week of 13 November when the runner-up was Pat Du Pré?
SQL: SELECT "semifinalists" FROM "table1_29302781_12" WHERE "week_of"='13 November' AND "runner_up"='Pat Du Pré';