Given the following passage  "A number of modern movements or tendencies in Buddhism emerged during the second half of the 20th Century, including the Dalit Buddhist movement (also sometimes called 'neo-Buddhism'), Engaged Buddhism, and the further development of various Western Buddhist traditions.",  answer the following question. Note that the answer is present within the text.  Question: Did Buddhism advance during the second or first portion of the century preceding the 21st?
Answer:
second