Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.

Let me give you an example: Paragraph: Nix v. Hedden , 149 U.S. 304 ( 1893 ) , was a decision by the Supreme Court of the United States that , under U.S. customs regulations , the tomato should be classified as a vegetable rather than a fruit . The Court 's unanimous opinion held that the Tariff Act of 1883 used the ordinary meaning of the words `` fruit '' and `` vegetable , '' instead of the technical botanical meaning .
Question: is tomato a fruit or vegetable us supreme court

The answer to this example can be: vegetable
Here is why: The answer 'vegetable' is correct as it lies in the sentence - "Nix v. Hedden , 149 U.S. 304 ( 1893 ) , was a decision by the Supreme Court of the United States that , under U.S. customs regulations , the tomato should be classified as a vegetable rather than a fruit ", which is a part of the passage.

OK. solve this:
Paragraph: The Commonwealth of Nations , normally known as the Commonwealth , is an intergovernmental organisation of 53 member states that are mostly former territories of the British Empire . The chief institutions of the organisation are the Commonwealth Secretariat , which focuses on intergovernmental aspects , and the Commonwealth Foundation , which focuses on non-governmental relations between member states .
Question: how many countries are still in the british commonwealth

Answer:
53