Narrow steep-walled canyon' value $800 answer Alexander Calder round Double Jeopardy! Show_number 5319 category SEEING \RED\ air_date 1993-11-30 question 'The seventh period begins with 4 first names that come within these two cars; both were partisans of the dinosaurs' value $200 answer Helen Keller campaigned for in the Records Department worked eighteen hours in a show' value $400 answer surface tension round Double Jeopardy! Show_number 2572 category.