CREATE TABLE table_55246 ("Year" TEXT, "President" TEXT, "Vice President" TEXT, "Gen.-Secretary" TEXT, "Treasurer" TEXT)

Which year has a Gen.-Secretary of silvana jansen?
SELECT "Year" FROM table_55246 WHERE "Gen.-Secretary" = 'silvana jansen'
SELECT "Year" FROM "table_55246" WHERE "Gen.-Secretary" = 'silvana jansen'