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Companies that have yet to be targeted by these or other hackers would do well to improve their security posture , but also to prepare for data breaches by tightening access to their backup environment , and knowing exactly who will be called in to help in case of a breach .
 hackers: attacker; Companies: 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: data breach 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, number of victim, compromised data, number of data 
Text: {0} 
Answer:
 hackers: attacker; Companies: victim