input: Please answer the following: Two teams of researches studied Antarctica's climate. The team studied two different regions. The US team studied East Antarctica, while the Swiss team studied West Antarctica. Which team didn't learn about a region that has a rising surface temperature?
++++++++++
output: US

input: Please answer the following: Bob and Bill studied at the same university. While Bob got into studying nutrition, Bill ended up studying about cancer and how to prevent it. Which student learned less about avoiding carcinogens?
++++++++++
output: Bob

input: Please answer the following: Two countries are situated on the shores of the same sea. Turkey is a nation of farmers, they use conventional agricultural methods to produce food, including lots of fertilizers. Greece's economy is mostly based on tourism. Which country created more beach litter?
++++++++++
output: Greece

input: Please answer the following: Two brothers were born 20 years apart. Tom, the older brother, was 72, while Dan was 52 years-old. they got along pretty well. Which brother didn't experience a decline in stamina?
++++++++++
output:
Dan