What is the meaning of `\u2014`

[shizhediao]

Dear authors, Thanks for your great work LSAT. I found that there are some \u2014 tokens in the data, may I ask what is the meaning of it? Thanks! For example, in AR_TrainingData.json "passage": "Hannah spends 14 days, exclusive of travel time, in a total of six cities. Each city she visits is in one of three countries\u2014X, Y, or Z.