1498
When this button is clicked , the ransomware queries the http://btc.blockr.io/ site to see if a payment has been made to the assigned bitcoin address .
 ( ransom: a payment has been made,  the assigned bitcoin address: payment method, ransomware: tool) 
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: a payment has been made,  the assigned bitcoin address: payment method, ransomware: tool) 