In this task, you are given a sentence from the research paper and your task is to classify the given sentence into the following categories: Background (Why is this problem important? What relevant works have been created before? What is still missing in the previous works? What are the high-level research questions? How might this help other research or researchers?), Purpose (What specific things do the researchers want to do? What specific knowledge do the researchers want to gain? What specific hypothesis do the researchers want to test?), Method (How did the researchers do the work or find what they sought? What are the procedures and steps of the research?), or Finding (What did the researchers find out? Did the proposed methods work? Did the thing behave as the researchers expected?). 

Ex Input:
responses to the severe acute respiratory syndrome ( SARS ) outbreak in 2003 and the Middle East respiratory syndrome ( MERS ) outbreak in 2015 had completely different outcomes.

Ex Output:
background


Ex Input:
N.

Ex Output:
background


Ex Input:
Introduction : This study compares the detection of 14 common respiratory viruses by two different real-time reverse transcription polymerase chain reaction ( rRT-PCR ) methods : in house singleplex tests developed by the Centers for Disease Control and Prevention and the commercially available Fast Track Diagnostic ( FTD ® ) Respiratory Pathogens 33 multiplex test.

Ex Output:

purpose