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Arvind Mohan Kayastha ( ) ( A.M. Kayastha ) born on August 1 1960 at Dharmashala is Professor at School of Biotechnology  Banaras Hindu University  ( BHU )  Varanasi  ( India ) and an established scientist in the field of Plant Biochemistry and Enzyme Technology .
 city of headquarters: Banaras Hindu University, Varanasi
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 city of headquarters: Banaras Hindu University, Varanasi