Problem: Text: Xmas is a common abbreviation of the word Christmas. It is sometimes pronounced /ksms/, but Xmas, and variants such as Xtemass, originated as handwriting abbreviations for the typical pronunciation /krsms/. The ''X'' comes from the Greek letter Chi, which is the first letter of the Greek word , which in English is ''Christ''. The ''-mas'' part is from the Latin-derived Old English word for Mass.

Question: is there a difference between xmas and christmas?
A: no

Problem: Text: Super Bowl XLVII was an American football game between the American Football Conference (AFC) champion Baltimore Ravens and the National Football Conference (NFC) champion San Francisco 49ers to decide the National Football League (NFL) champion for the 2012 season. The Ravens defeated the 49ers by the score of 34--31, handing the 49ers their first Super Bowl loss in franchise history. The game was played on Sunday, February 3, 2013 at Mercedes-Benz Superdome in New Orleans, Louisiana. This was the tenth Super Bowl to be played in New Orleans, equaling Miami's record of ten in an individual city.

Question: did the 49ers win the superbowl in 2012?
A: no

Problem: Text: Salt water chlorination is a process that uses dissolved salt (2,500--6,000 ppm) as a store for the chlorination system. The chlorine generator (also known as salt cell, salt generator, salt chlorinator or SWG) uses electrolysis in the presence of dissolved salt (NaCl) to produce hypochlorous acid (HClO) and sodium hypochlorite (NaClO), which are the sanitizing agents already commonly used in swimming pools. As such, a saltwater pool is not actually chlorine-free; it simply utilizes added salt and a chlorine generator instead of direct addition of chlorine.

Question: can you use chlorine in a saltwater pool?
A:
yes