804
Although other nitrites induce methemoglobinemia , exposure to methyl nitrite during phenylpropanolamine production appears to be a new cause of occupational methemoglobinemia .
 adverse effect: methemoglobinemia, methyl nitrite; adverse effect: methemoglobinemia, methyl nitrite
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, methyl nitrite; methemoglobinemia, methyl nitrite 
Answer:
 adverse effect: methemoglobinemia, methyl nitrite; adverse effect: methemoglobinemia, methyl nitrite