NLP, Python, Scikit Learn.
print(model.labels_) # [-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 # -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 # ... # -1 -1 -1 -1 -1 -1 -1 -1] The value -1 means that the data is too noisy and could not be clustered. What is the reason for