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:
and suggest that the Tat-Egr-1-p300-GFAP axis likely contributes to Tat neurotoxicity and predisposes astrocytes to be an HIV-1 sanctuary in the CNS.

Ex Output:
finding


Ex Input:
Expression of a small ( 35aa ) sequence in Domain III alone was sufficient to form speckles for all 3 viral nsp15s.

Ex Output:
finding


Ex Input:
The overall objective of this study was to compare the efficacy of medium-chain fatty acids ( MCFA ) to other common fat sources to minimize the risk of porcine epidemic diarrhea virus ( PEDV ) cross-contamination in a pig bioassay.

Ex Output:

purpose