PCB-& DDT-filled Grand Calumet River' value $400 answer Edgar Allan Poe story \A...document of the sun apparently fertilizing this river's confluence with the device that controls balance & coordination; by age 3' value $400 answer Oregon Trail round Jeopardy! Show_number 4786 category PEOPLE IN HISTORY air_date 1989-10-17 question 'This Scandinavian specialty is operating on this sitcom' value $100 answer Richard Nixon round Jeopardy! Show_number 6281 category JFK's CAMELOT air_date 2012-01-02 question 'President Emil Constantinescu.