1300
A few months ago we exclusively reported on a Dark Web vendor selling 1 Billion user accounts stolen from the Chinese Internet giants .
 selling: purpose; user accounts: compromised data; the Chinese Internet giants: victim; a Dark Web vendor: attacker; A few months ago: time; 1 Billion: number of data
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:
 selling: purpose; user accounts: compromised data; the Chinese Internet giants: victim; a Dark Web vendor: attacker; A few months ago: time; 1 Billion: number of data