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CASE REPORT: We describe here a case of a 60 year old female that experienced a relapse of symptomatic hyperlactatemia after being switched from stavudine to zidovudine and how the case was managed at the Infectious Diseases Institute, Kampala, Uganda.
 a case of a 60 year old female: Subject; 60 year old: Subject.Age; female: Subject.Gender; relapse of symptomatic hyperlactatemia: Effect; switched from stavudine to zidovudine: Treatment; stavudine: Treatment.Drug; zidovudine: Treatment.Drug
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: adverse event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Subject.Disorder, Treatment.Route, Subject.Race, Treatment.Time_elapsed, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 a case of a 60 year old female: Subject; 60 year old: Subject.Age; female: Subject.Gender; relapse of symptomatic hyperlactatemia: Effect; switched from stavudine to zidovudine: Treatment; stavudine: Treatment.Drug; zidovudine: Treatment.Drug