1462
CASE REPORT: A 29-year-old black man, HIV-infected since 1996, began highly active antiretroviral therapy (HAART) with zidovudine, lamivudine, and indinavir.
 potential therapeutic event: began 
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: began 