1048
The administration of "sweet spirits of nitre" (4% ethyl nitrite CH3CH2ONO in 70% ethyl alcohol) was followed by acute methemoglobinemia and severe anoxic metabolic acidosis in infant twins, Methylene blue administration reversed methemoglobinemia in both, but one twin died from the consequences of hypoxemia.
 infant twins: Subject; infant: Subject.Age; acute methemoglobinemia and severe anoxic metabolic acidosis: Effect; "sweet spirits of nitre" (4% ethyl nitrite CH3CH2ONO in 70% ethyl alcohol): Treatment; sweet spirits of nitre: 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:
 infant twins: Subject; infant: Subject.Age; acute methemoglobinemia and severe anoxic metabolic acidosis: Effect; "sweet spirits of nitre" (4% ethyl nitrite CH3CH2ONO in 70% ethyl alcohol): Treatment; sweet spirits of nitre: Treatment.Drug