TASK DEFINITION: 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?). ",
PROBLEM: Sentence: This study , therefore , made a follow-up assessment of PTSD in flood victims 13-14 years after they were diagnosed with PTSD in 2000 to measure the prevalence rate of PTSD among them and identify the association between social support and their recovery from PTSD. 
 Section: purpose

SOLUTION: True

PROBLEM: Sentence: employing passive fluid pumping to inoculate cell monolayers with virus and drive infection spread. 
 Section: method

SOLUTION: True

PROBLEM: Sentence: Binding of short interfering ribonucleic acid ( siRNA ) to a dendrimer molecule decreased the availability of cationic groups and diminished their cytotoxicity. 
 Section: finding

SOLUTION:
True