{ UK , US , AU } . Figure 1 : Proposed architecture Figure 2 : Baseline GMM based dialect classification 5.2 Latent Semantic Analysis for Dialect ID One approach used to address topic classification problems has been latent semantic analysis ( LSA ) , which was first explored for document indexing in ( Deerwester et al , 1990 ) . This addresses the issues of synonymy - many ways to refer to the same idea and polysemy ?