Question: In the week of what was the runner-up Pat Du Pré?
SQL: SELECT "Week of" FROM "1-29302781-12" WHERE "Runner-up" = 'Pat Du Pré';

Question: Who were the semifinalists when the runner-up was Peter Feigl?
SQL: SELECT "Semifinalists" FROM "1-29302781-12" WHERE "Runner-up" = 'Peter Feigl';

Question: Who were the semifinalists when the runner-up was Pat Du Pré?
SQL: SELECT "Semifinalists" FROM "1-29302781-12" 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 "1-29302781-12" WHERE "Week of" = '13 November' AND "Runner-up" = 'Pat Du Pré';