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He was started on oral lansoprazole 60 mg twice daily and, on hospital day 2, his platelet count decreased to 102 x 10(3)/mm(3); on hospital day 3, the platelet count was 36 x 10(3)/mm(3).
 He: Subject; He: Subject.Gender; platelet count decreased: Effect; oral lansoprazole 60 mg twice daily: Treatment; oral: Treatment.Route; lansoprazole: Treatment.Drug; 60 mg: Treatment.Dosage; twice daily: Treatment.Freq; day 2: 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:
 He: Subject; He: Subject.Gender; platelet count decreased: Effect; oral lansoprazole 60 mg twice daily: Treatment; oral: Treatment.Route; lansoprazole: Treatment.Drug; 60 mg: Treatment.Dosage; twice daily: Treatment.Freq; day 2: Treatment.Duration