Task: Question Answering
Input (English): Context: We each hauled a load and came back for the last one and the horses . We did n't have lunch until five but he treated me at the truck stop on the way home from town . This morning we went in a watched them sell . 31 heifers weighed an average of 820 pounds and brought $ 775 a head . 
Question: At what event were the heifers sold ?
Output (English): Livestock auction.