KBP

Example:He is an expert in artificial intelligence and holds several patents in the field.

Definition:A person who by long study and practice has acquired special skill in or knowledge of a particular branch of learning or an art or science.

Example:She is a specialist in financial analysis and has been appointed to the key position in the company.

Definition:A person who has developed great knowledge or ability in a particular field.

Example:The consultant provided valuable insights and helped the company to improve its operations.

Definition:A person who offers advice or information to solve problems or answer questions.