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) -- A political clash over the legitimacy of Venezuelan President Hugo Chavez's next term loomed as the announcement came that he will be unable to attend his inauguration. With Chavez unable to be sworn in, a number of constitutional questions have become central: Can the president be sworn in on another day? And who should be in charge in the meantime? The disagreement hangs a cloud of uncertainty over Venezuela, as political forces disagree on whether Chavez will be a legitimate president or whether someone else should assume power and call for new elections. Officials on Tuesday confirmed that medical treatment in Cuba will keep Chavez from being sworn in for his new term this week.Officials say Hugo Chavez will not be in Venezuela for inauguration dayGovernment, opposition differ on what happens next; lawmakers debating issueChavez's term automatically renews, the government saysThe constitution makes it clear that this is not the case, opponents say 
 Question:The 58-year-old Venezuelan president has been treated for cancer in _ for the past month, most recently battling respiratory complications.

Cuba