Here is a question about this article: According to most scholars, at some period after the Second Council the Sangha began to break into separate factions.[note 37] The various accounts differ as to when the actual schisms occurred. According to the Dipavamsa of the Pali tradition, they started immediately after the Second Council, the Puggalavada tradition places it in 137 AN, the Sarvastivada tradition of Vasumitra says it was in the time of Ashoka and the Mahasanghika tradition places it much later, nearly 100 BCE.
What is the answer to this question: According to the Dipavamsa they started immediately after what council?
the Second Council