In this task, you are given a sentence from the research paper and the category to which it belongs. Your task is to classify whether the given category is correct or not by providing "True" and "False", respectively. Here are the definitions for the 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?). ",
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Question: Sentence: atomic force microscopy ( AFM ) and N 2 physisorption indicated that the addition of polyethylene glycol ( PEG ) not only improved the coating properties of TiO 2 but also served as poragen to produce high surface area , mesoporous TiO 2. 
 Section: purpose

Answer: False


Question: Sentence: However , the exact interplay between HCV replication and oxidative stress has not been elucidated. 
 Section: background

Answer: True


Question: Sentence: which are crucial for viral infection. 
 Section: purpose

Answer:
True