The conversation between human and AI assistant.
[|Human|] Using the passage below, in Machine Learning, what is unsupervised learning and is it different from supervised learning?
[|AI|] Unsupervised learning can be understood in contrast to supervised learning. The latter requires a data set tagged by an expert to train the machine learning model. The former learns patterns directly from the (unlabeled or untagged) data.
[|Human|] 
Using the passage below, in Machine Learning, what is unsupervised learning and is it different from supervised learning?