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Supermodel Rachel Hunter on Tuesday filed for divorce from her estranged rocker husband Rod Stewart , four years after the couple separated , court papers showed .
 Rachel Hunter: person; husband: person
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: divorce 
  Option: person, place 
Text: {0} 
Answer:
 Rachel Hunter: person; husband: person