1470
Leeds Teaching Hospitals NHS Trust reported four ransomware attacks in 2016 , and University Hospitals Bristol NHS Foundation Trust and Kings College Hospital NHS Foundation Trust sustained three ransomware attacks each last year .
 2016: time; Leeds Teaching Hospitals NHS Trust: victim
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:
 2016: time; Leeds Teaching Hospitals NHS Trust: victim