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Updown is a package written in Scala for performing semi-supervised polarity classification on tweets. It is the code behind the paper Twitter Polarity Classification with Label Propagation over Lexical Links and the Follower Graph by Michael Speriosu, Nikita Sudan, Sid Upadhyay, and Jason Baldridge, from The EMNLP 2011 Workshop on Unsupervised Learning in NLP.

Getting Started

Getting Started contains instructions on building the code, preprocessing data, and running the experiments from the paper.

Misc

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