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Infants are particularly susceptible to chronic nitrate - induced methemoglobinemia because of their low stomach acid production , large numbers of nitrite - reducing bacteria , and the relatively easy oxidation of fetal hemoglobin .
 adverse effect: methemoglobinemia, nitrate
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  methemoglobinemia, nitrate 
Answer:
 adverse effect: methemoglobinemia, nitrate