Context: 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.

Question: What two dialects does Western Catalan include?
Answer: Northwestern Catalan and Valencian

Question: How many dialects are in the eastern group?
Answer: four

Question: To what division does Central Catalan belong?
Answer: Eastern block

Question: What other divisions can be made of dialects?
Answer: subdialects

Question: What block does Northwestern Catalan and Valencian belong to?
Answer: Western Catalan