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:
influenza A/H3N2 ( A/H3 ) and other respiratory virus infections in hospitalised patients.

Ex Output:
purpose


Ex Input:
there are also strong similarities.

Ex Output:
background


Ex Input:
The introduction of the 5H2 epitope ablated two epitopes on DENV1 EDI recognized by human MAbs ( 1F4 and 14C10 ) that strongly neutralize DENV1.

Ex Output:

finding