CREATE TABLE table_31103 ("Week of" CLOB, "Tournament" CLOB, "Champion" CLOB, "Runner-up" CLOB, "Semifinalists" CLOB, "Quarterfinalists" CLOB)

Who were the semifinalists when the runner-up was Pat Du Pr ?
SELECT "Semifinalists" FROM table_31103 WHERE "Runner-up" = 'Pat Du Pré'
SELECT "Semifinalists" FROM "table_31103" WHERE "Runner-up" = 'Pat Du Pré'