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In a letter [ PDF ] to workers and the California Attorney General 's office , the aerospace contractor said that between April 18 , 2016 and March 29 , 2017 , crooks infiltrated the website , allowing them to access staffers ' W - 2 paperwork for the 2016 tax year .
 W - 2 paperwork: compromised data; infiltrated the website: attack pattern; crooks: attacker; staffers: victim; 2016: time; the aerospace contractor: victim; between April 18 , 2016 and March 29 , 2017: 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: data breach 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, number of victim, compromised data, number of data 
Text: {0} 
Answer:
 W - 2 paperwork: compromised data; infiltrated the website: attack pattern; crooks: attacker; staffers: victim; 2016: time; the aerospace contractor: victim; between April 18 , 2016 and March 29 , 2017: time