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And ransomware attacks have claimed a number of recent victims , especially healthcare systems , including MedStar Health , which suffered a major attack affecting 10 hospitals and more than 250 outpatient centers in March 2016 .
 hospitals: victim; outpatient centers: attacker; March 2016: time
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 hospitals: victim; outpatient centers: attacker; March 2016: time