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 Q]: The global therapeutic monoclonal antibody market was valued at approximately US$ 115.2 billion in 2018 and is expected to generate revenue of $ 150 billion by the end of 2019 and $ 300 billion by 2025.
[EX A]: background

[EX Q]: we performed systematic mutation analyses to identify residues critical for 3CL pro dimerization and activity in this study.
[EX A]: background

[EX Q]: A total of 29 faecal samples collected from dogs with diarrhoea following canine parvovirus ( CPV ) vaccination were tested by minor groove binder ( MGB ) probe assays for discrimination between CPV vaccine and field strains and by diagnostic tests for detection of other canine pathogens.
[EX A]:
background