Detailed Instructions: Given a document, find the main entity about whom the author is writing. Write the full name if mentioned in the text. Note that URLs in the text have been replaced with [Link].
Problem:-- Mitt Romney -LRB- @MittRomney -RRB- September 25 , 2017 . 
Romney said he had spoken with former Puerto Rican Gov. Luis Fortuño , who said the island is on the "brink of humanitarian disaster ." 
Meanwhile , Mitt Romney is among a number of high-profile political figures stepping in to fill the void .
Solution:
Mitt Romney