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In this case report we present a rare drug interaction between erythromycin and ergotamine at normal doses causing lower extremity ischemia in a 36-year-old woman.
 a 36-year-old woman: Subject; 36-year-old: Subject.Age; woman: Subject.Gender; lower extremity ischemia: Effect; a rare drug interaction between erythromycin and ergotamine at normal doses: Treatment; erythromycin: Treatment.Drug; ergotamine: Treatment.Drug; normal doses: Treatment.Dosage; erythromycin: Combination.Drug; ergotamine: Combination.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 36-year-old woman: Subject; 36-year-old: Subject.Age; woman: Subject.Gender; lower extremity ischemia: Effect; a rare drug interaction between erythromycin and ergotamine at normal doses: Treatment; erythromycin: Treatment.Drug; ergotamine: Treatment.Drug; normal doses: Treatment.Dosage; erythromycin: Combination.Drug; ergotamine: Combination.Drug