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?). 

Example Input: This review attempts to identify potentially important genes that show some consistency in ( relative ) up or downregulation in key tissues between the resistant and susceptible chickens.
Example Output: purpose

Example Input: Herein , we describe a loopmediated isothermal amplification ( LAMP ) assay that was developed for the quantitative detection of EEDV in infected fish tissues.
Example Output: background

Example Input: Here we present a metapopulation model of disease spread in Great Britain defined at the level of electoral wards.
Example Output:
purpose