81585
The work of Heinrich Schenker and his ideas about " foreground " , " middleground " , and " background " became enormously influential in the teaching of composition and interpretation .
 person: Heinrich Schenker
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Heinrich Schenker 
Answer:
 person: Heinrich Schenker