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The data set is then treated as a classification problem while investigating the applicability of existing artificial neural network algorithms , such as the TensorFlow in the Python language , to match acoustic data with density measurements .
 data, as, classification, artificial neural network, algorithms, as, data, density measurements
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 data, as, classification, artificial neural network, algorithms, as, data, density measurements