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She had been on Copaxone 20 mg/day treatment for 2 years when she first exhibited gastrointestinal symptoms.
 she: Subject; she: Subject.Gender; gastrointestinal symptoms: Effect; Copaxone 20 mg/day treatment for 2 years: Treatment; Copaxone: Treatment.Drug; 20 mg/day: Treatment.Dosage; 2 years: Treatment.Duration
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:
 she: Subject; she: Subject.Gender; gastrointestinal symptoms: Effect; Copaxone 20 mg/day treatment for 2 years: Treatment; Copaxone: Treatment.Drug; 20 mg/day: Treatment.Dosage; 2 years: Treatment.Duration