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: "when did plasma become a state of matter?" whose answer is 1920s.
Each document should contain about 30 words, and these documents should contain useful information.

Query: discovery of plasma state of matter
Useful Output:

Doc 1: Plasma is an ionized state made up of positively charged ions and negatively charged electrons. There are several reasons why electrons in atoms can separate
Doc 2: Scientists have discovered a novel way to classify magnetized plasmas that could possibly lead to advances in harvesting on Earth the fusion energy.
Doc 3: The plasma phases that PPPL has uncovered are technically known as “topological phases,” indicating the shapes of the waves supported by plasma.
Doc 4: And you may also know the fourth state of matter: plasma, which is found in sources like lightning, neon bulbs, and stars, including the Sun.
Doc 5: This soup of electrons and ions is plasma--the fourth state of matter. It was discovered by William Crookes in 1879. Plasma is seen in the