How to find documents that are similar to a query document
		• Convert each document into a “bag of words”. – This is a vector of word counts ignoring the order. – Ignore stop words (like “the” or “over”) • We could compare the word counts of the query document and millions of other documents but this is too slow. – So we reduce each query vector to a much smaller vector that still contains most of the information about the content of the document.
						fish cheese vector count school query reduce bag pulpit iraq word
				0 0 2 2 0 2 1 1 0 0 2