44092
Completion of Albert Einstein 's unified field theory Sachs has attempted to complete Albert Einstein 's unified field theory by unifying the fields relativistically , then showing that Quantum Mechanics emerges under certain conditions .
 person: Sachs
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: Sachs 
Answer:
 person: Sachs