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: "Terfenol-D is an alloy that contains a chemical element with an atomic number of what?" whose answer is 66.
Each document should contain about 30 words, and these documents should contain useful information.

Query: atomic number of dysprosium
Useful Output:

Doc 1: Dysprosium (Dy) is a silvery coloured metal that has the atomic number 66 in the periodic table. It is a Lanthanide metal.
Doc 2: Dysprosium (atomic symbol: Dy, atomic number: 66) is a Block F, Group 3, Period 6 element with an atomic radius of 162.5. Dysprosium Bohr Model The number
Doc 3: Chemical element, Dysprosium, information from authoritative sources. Look up properties, history, uses, and more.
Doc 4: An element of the rare earth family that has the atomic symbol Dy, atomic number 66, and atomic weight 162.50. Dysprosium is a silvery metal used primarily in
Doc 5: Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure.