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: In this study , we isolated and characterized progenitor epithelial cells from the bone marrow of 4-to 5-week old germ-free pigs. 
 Section: method

Answer: True


Question: Sentence: The study population comprised of Chinese adults ( aged 18-60 ) who were living in Hong Kong. 
 Section: method

Answer: True


Question: Sentence: Pulmonary arterial hypertension ( PAH ) is a chronic lung disease with poor diagnosis and limited therapeutic options. 
 Section: method

Answer:
False