{"paper":{"title":"F-theory GUTs with U(1) Symmetries: Generalities and Survey","arxiv_id":"1102.0290","primary_cat":"hep-th","submitted_at":"2011-02-01T21:00:17+00:00","version_compiled":"v2"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13-20260917 on the question bank abstract-p1-20260923, exactly as returned. 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