CREATE TABLE table_204_98 (id DECIMAL, "year" DECIMAL, "competition" TEXT, "venue" TEXT, "position" TEXT, "event" TEXT, "notes" TEXT)

how many years after the turin marathon did the berlin marathon occur ?
SELECT (SELECT "year" FROM table_204_98 WHERE "competition" = 'berlin marathon') - (SELECT "year" FROM table_204_98 WHERE "competition" = 'turin marathon')
SELECT (SELECT "year" FROM "table_204_98" WHERE "competition" = 'berlin marathon') - (SELECT "year" FROM "table_204_98" WHERE "competition" = 'turin marathon')