CREATE TABLE table_50202 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

When was the home team score 17.5 (107)?
SELECT "Date" FROM table_50202 WHERE "Home team score" = '17.5 (107)'
SELECT "Date" FROM "table_50202" WHERE "Home team score" = '17.5 (107)'