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 Mocoví are an indigenous tribe of a sparsely populated region of what basin?" whose answer is Río de la Plata basin.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Mocoví tribe location
Useful Output:

Doc 1: of the biggest Mocovi communities in the Southern Chaco region. The aim was to teach the. Indians Spanish and to give them an education. The
Doc 2: Mocoví is a Southern Guaicuruan language spoken mainly in eastern Chaco Province, central and northern Santa Fe Province, and southern Formosa Province in the
Doc 3: of the biggest Mocovi communities in the Southern Chaco region. The aim was to teach the. Indians Spanish and to give them an education. The
Doc 4: The mocovies are an ancient Aboriginal village of Santa Fe, Chaco and Corrientes. Without place in today's Argentine society, they express their resistance.
Doc 5: The Mocoví language is a Guaicuruan language of Argentina spoken by about 3,000 people, mostly in Santa Fe, Chaco, and Formosa provinces.