2770
In the  University of  Kohlrausch documented  his  practical experiments resulting in the book Leitfaden der praktischen Physik ( Guidelines to Practical Physics ) which was published in 1870 as the first book of its type in Germany .
 employee of: University of, his
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:
 employee of: University of, his