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: "citizens voting directly on a proposed constitutional amendment is one example of?" whose answer is initiated constitutional amendment.
Each document should contain about 30 words, and these documents should contain useful information.

Query: direct democracy examples
Useful Output:

Doc 1: Three instruments form the basis of direct democracy in Switzerland: the popular initiative, the optional referendum, and the mandatory
Doc 2: Introducing direct democracy is a new phase in the expansion of political rights: it consists in extending the right of initiative and veto on laws.
Doc 3: Direct democracy is a system of government where citizens vote directly on laws and policies rather than electing representatives to make
Doc 4: Direct democracy comes in a variety of institutional forms, with the common feature of procedures focusing on popular votes on political issues.
Doc 5: For example, the referendums on abortion in Portugal (1998 and 2007) and on electoral reform in Ireland. (1958 and 1968) were able to settle these issues in an