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?). 

[Q]: Cyclophilin A has attracted attention recently as a new target of anti-human immunodeficiency virus type 1 ( HIV-1 ) drugs.
[A]: background


[Q]: we also identified ARI episodes among other children < 5 years old in the same household.
[A]: method


[Q]: we call for research and investment in three areas : 1 ) surveillance among wildlife to identify the high-risk pathogens they carry ; 2 ) surveillance among people who have contact with wildlife to identify early spillover events ; and 3 ) improvement of market biosecurity regarding the wildlife trade.
[A]:
purpose