181398
In England , he also spent time looking at coaching methods , techniques and tactics at English clubs Sheffield United and Tottenham Hotspur while in 1974 , he traveled to Germany where he spent time with European giants FC Bayern Munich .
 Sheffield United, Tottenham Hotspur, FC Bayern Munich
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sheffield United, Tottenham Hotspur, FC Bayern Munich