6643
The mild immunosuppression that occurs with methotrexate therapy probably places patients with rheumatoid arthritis at added risk of developing lymphoproliferative diseases , but coincidence can not be excluded .
 adverse effect: lymphoproliferative diseases, methotrexate
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:  lymphoproliferative diseases, methotrexate 
Answer:
 adverse effect: lymphoproliferative diseases, methotrexate