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We had reported earlier in our findings that over 180 Indian companies were victims of Ransomware online extortion schemes in the first six months of the year 2016 , causing a loss of whopping $ 3 billion .
 ( ransom: Ransomware online extortion schemes,  Indian companies: victim, the first six months of the year 2016: time, $ 3 billion: price) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( ransom: Ransomware online extortion schemes,  Indian companies: victim, the first six months of the year 2016: time, $ 3 billion: price) 