CREATE TABLE table_79467 ("Event" TEXT, "Class" TEXT, "Gold" TEXT, "Silver" TEXT, "Bronze" TEXT)

Who received gold when the event is time trial details and silver is simon richardson great britain (gbr)?
SELECT "Gold" FROM table_79467 WHERE "Event" = 'time trial details' AND "Silver" = 'simon richardson great britain (gbr)'
SELECT "Gold" FROM "table_79467" WHERE "Event" = 'time trial details' AND "Silver" = 'simon richardson great britain (gbr)'