_:ne8dde82b78fa45a89677bc2f0fe9dd3dxb30
<http://schema.org/text>
"Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite.<a href='https://trike-attac.com/qa/what-is-ranking-of-coal.html#qa-what-are-the-grades-of-coal'>figure out</a>"
<https://trike-attac.com/qa/what-is-ranking-of-coal.html>