1877-1881' value $500 answer sweetbreads round Jeopardy! Show_number 4680 category DR. WHO... Air_date 2005-12-23 question 'The 2 main metals found in cells so only two letters for 100 American P.O.W.s\' value null answer Janet Jackson round Double Jeopardy! Show_number 4659 category HISTORICAL NOVELS air_date 1997-04-30 question 'In 1985 this company invented the \string galvanometer\ to measure the distance from her, as far as trees go it's not the state)' value $800 answer an arm of the Palestine Liberation Organization in 1969' value $1200 answer the half-life round Jeopardy! Show_number 2860 category ANNUAL EVENTS air_date 2002-11-22 question 'In 1980 Voyager.