1507
Flare of Kaposi 's sarcoma ( KS ) is well described in immunosuppressed patients treated with corticosteroids and rituximab , but has not yet been reported during treatment with imatinib .
 adverse effect: Kaposi 's sarcoma, rituximab; adverse effect: KS, rituximab
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:  Kaposi 's sarcoma, rituximab; KS, rituximab 
Answer:
 adverse effect: Kaposi 's sarcoma, rituximab; adverse effect: KS, rituximab