Task: Question Answering
Input (English): Background Paragraph: Hepatitis B is a contagious virus that affects the liver, infection can last from a few weeks to a serious lifelong illness. Two different types of infection exist for this disease, "acute" and "chronic." Acute Hepatitis B is a short term illness that occurs within 6 months of exposure, Chronic Hepatitis B is long term and happens when the virus remains in the body. The younger the child is, the greater their chance of developing a chronic infection and this risk goes down as the child gets older. Approximately 90% of infected infants will develop a chronic infection.[3]. 
Story: A 2nd grade classroom photo was held today. They all gathered by age. Susan was the oldest. Margaret was the 2nd oldest. Dorothy was the 3rd oldest. Lisa was the 4th oldest. Nancy was the 5th oldest. Karen was the 6th oldest. The last one was Betty, who was the youngest. They all looked great that day. 
Question: Who has a greater chance of developing a chronic infection: Karen or Betty?
Output (English): Betty.