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: "How many municipalities did one of the palce where Echinocactus polycephalus occured divided into?" whose answer is 72 municipalities.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Echinocactus polycephalus occurrence
Useful Output:

Doc 1: In Arizona, it is a common plant along the south side of Lake Mead and scattered in suitable areas farther south in Arizona. It is "spotty" in
Doc 2: Plants morphologically intermediate between the two varieties, however, occur at one site south of Lake Mead, Arizona, where the geographic ranges of the
Doc 3: Growing habit, Nayarit, Sonora, Mexico. An old multi-headed specimen. Origin and Habitat: USA (Mohave and Sonoran desert: Yuma and Mojave Co., Arizona
Doc 4: Echinocactus polycephalus is a shrub (stem succulent) that is native to California, and also found elsewhere in western North America.
Doc 5: Geographic Range: This sparse shrubland occurs extensively on northern aspects in the inner gorge of Grand Canyon National Park. Occurrence of stands outside