You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "the ceasar salad was first served in which country?" whose answer is Mexico.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of caesar salad
Useful Output:

Doc 1: The world-famous Caesar Salad originated in Mexico. This recipe is adapted from Hotel Caesar's in Tijuana, Baja California, the birthplace of the Caesar salad.
Doc 2: The origin of Caesar salad is said to be Cesare Cardini, in Tijuana, Baja Cesare Cardini, an Italian immigrant who had restaurants in the U.S.
Doc 3: Some say the original Caesar salad was invented in Chicago in 1903, some say it was a French-inspired Italian-American chef Caesar Cardini who
Doc 4: It was once called 'the greatest recipe to originate in the Americas in 50 years', but its origins are shrouded in mystery.
Doc 5: Caesar salad has nothing to do with the Roman emperor. It was actually invented in 1924 by Caesar Cardini, an Italian restaurant owner in Tijuana, Mexico.