Read this: Western Catalan comprises the two dialects of Northwestern Catalan and Valencian; the Eastern block comprises four dialects: Central Catalan, Balearic, Rossellonese, and Alguerese. Each dialect can be further subdivided in several subdialects.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): How many dialects are in the eastern group?
four