human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "Social Media Campaigns For New Product Introductions"
  Abstract: {}

Connected through hyperedge HE-1 (induced by source paper "Twitter power: Tweets as electronic word of mouth"):
  with members:
    - "Predicting Elections with Twitter: What 140 Characters Reveal about Political Sentiment"
    - "Microblog language identification: overcoming the limitations of short, unedited and idiomatic text"
    - "Truthy: mapping the spread of astroturf in microblog streams"
    - "Opinion observer: analyzing and comparing opinions on the Web"
    - "Entity-based Classification of Twitter Messages"
    - "The Catalyzing Factors of Official Documents Exchange via Microblogging in Public Sectors: A Case Study based on the T-O-E Framework"
    - "Analyzing Second Screen Based Social Soundtrack of TV Viewers from Diverse Cultural Settings"

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science