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KAGAN It turns out this is actually a story about a brother , Lieutenant Commander Mike Roberts , and a supportive sister , Christine Cupolo .
 a brother, Lieutenant Commander, Lieutenant Commander Mike Roberts, a supportive sister, Christine Cupolo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 a brother, Lieutenant Commander, Lieutenant Commander Mike Roberts, a supportive sister, Christine Cupolo