Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- On the surface, the first round of the Egyptian presidential election seemed to show that the Muslim Brotherhood and the remnants of the Mubarak regime are locked in mortal combat for the political soul of Egypt -- as Brotherhood candidate Mohamed Morsi faces pro-military candidate Ahmed Shafik in a second round of voting in June. Buying into this simplistic formula, however, would be a total misreading of the far more complex picture. To understand the political reality of Egypt and the strengths and weaknesses of the major political forces operating in the country, one needs to look more closely at all of the electoral results.Mohammed Ayoob: Muslim Brotherhood lost half its support between the two electionsThe Brotherhood can't govern by itself with support of only 22% of electorate, he writesAyoob: Mubarak-linked candidate did well, but social justice proponent did well, tooLiberals, Nasserists and Brotherhood must form their own coalition, Ayoob writes 
 Question:But his performance can also be read as the last gasp of the old regime, which can be well and truly buried if its opponents, from the Brotherhood to the _ and liberals, can form a coalition capable of providing effective and legitimate government.

Nasserists