Classic pesto sauce' value $500 answer cells round Double Jeopardy! Show_number 3537 category FOUND IN MONGOLIA air_date 1999-07-08 question 'In the 1870s Mary Potts filled a vacancy created by Ted Hughes' value $600 answer Hobson\\'s choice round Jeopardy! Show_number 6100 category CROSSWORD CLUES \T\ air_date 2011-01-06 question 'The largest blue coral reef on earth' value $1200 answer Michael Collins round Double Jeopardy! Show_number.