857
Two pediatric oncology patients with Ewing's sarcoma and one with mixed germ cell tumor were treated with drug regimens that included bleomycin or cyclophosphamide.
 potential therapeutic event: treated with 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 potential therapeutic event: treated with 