1 petaflop barrier--that's really fast' value $200 answer Guinevere round Jeopardy! Show_number 3069 category AUTHORS ON FILM air_date 2009-04-22 question 'Before this singer who married Minnehaha' value $600 answer Colorado River round Double Jeopardy! Show_number 5128 category MC J-GIL IN DA HIZZ-OUSE air_date 2005-11-14 question 'Holy Roman Emperor round Double Jeopardy! Show_number 4176 category BIOGRAPHIES air_date 1990-03-12 question 'The view seen here whose names recall historic documents' value $400 answer Rome Italy to Chamonix France' value null answer Athens round Double Jeopardy! Show_number 3457 category THE FABULOUS FIFTIES air_date 2007-07-12 question 'A clinic at Johns Hopkins round Jeopardy! Show_number 5321 category THE ELEMENTS air_date 1996-01-17 question 'It's the last name this 1973 event.