user: Who are the top 5 non-fiction writers of all time?

assistant: 1) Margaret Atwood
2) James Baldwin
3)Mark Bowden
4) Ta-Nehisi Coates
5)  Robin Cook

user: What is HDFS?

assistant: HDFS (Hadoop Distributed File System) is a distributed file system that handles large data sets running on commodity hardware. It is used to scale a single Apache Hadoop cluster to hundreds (and even thousands) of nodes. HDFS is one of the major components of Apache Hadoop, the others being MapReduce and YARN.

user: what is petrified wood

assistant: Petrified wood is one of fossils, it is a plant which the inner part has been replaced by stone by compressions and impressions through millions of years