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A 55-year-old HIV-positive African woman received a single epidural triamcinolone injection for pain relief of postherpetic neuralgia.
 A 55-year-old HIV-positive African woman: Subject; 55-year-old: Subject.Age; HIV: Subject.Disorder; African: Subject.Race; woman: Subject.Gender; a single epidural triamcinolone injection: Treatment; pain relief of postherpetic neuralgia: Treatment.Disorder; triamcinolone: Treatment.Drug; injection: Treatment.Route
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: potential therapeutic event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Treatment.Time_elapsed, Subject.Disorder, Subject.Race, Treatment.Route, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 A 55-year-old HIV-positive African woman: Subject; 55-year-old: Subject.Age; HIV: Subject.Disorder; African: Subject.Race; woman: Subject.Gender; a single epidural triamcinolone injection: Treatment; pain relief of postherpetic neuralgia: Treatment.Disorder; triamcinolone: Treatment.Drug; injection: Treatment.Route