Answer the question from the given passage. Your answer should be directly extracted from the passage, and it should be a single entity, name, or number, not a sentence.

[EX Q]: Passage: Professional sports teams in Southern California include teams from the NFL (Los Angeles Rams, San Diego Chargers); NBA (Los Angeles Lakers, Los Angeles Clippers); MLB (Los Angeles Dodgers, Los Angeles Angels of Anaheim, San Diego Padres); NHL (Los Angeles Kings, Anaheim Ducks); and MLS (LA Galaxy). Question: The Los Angeles Angels of Anaheim are from which sport?
[EX A]: MLB

[EX Q]: Passage: Between Bingen and Bonn, the Middle Rhine flows through the Rhine Gorge, a formation which was created by erosion. The rate of erosion equaled the uplift in the region, such that the river was left at about its original level while the surrounding lands raised. The gorge is quite deep and is the stretch of the river which is known for its many castles and vineyards. It is a UNESCO World Heritage Site (2002) and known as 'the Romantic Rhine', with more than 40 castles and fortresses from the Middle Ages and many quaint and lovely country villages. Question: How was the Rhine Gorge formed?
[EX A]: erosion

[EX Q]: Passage: When considering computational problems, a problem instance is a string over an alphabet. Usually, the alphabet is taken to be the binary alphabet (i.e., the set {0,1}), and thus the strings are bitstrings. As in a real-world computer, mathematical objects other than bitstrings must be suitably encoded. For example, integers can be represented in binary notation, and graphs can be encoded directly via their adjacency matrices, or by encoding their adjacency lists in binary. Question: What is the name of the alphabet is most commonly used in a problem instance?
[EX A]:
binary