1231
We report four cases of hemodynamically significant pericardial effusion in patients with refractory lymphoma who were receiving gemcitabine , all of whom had a history of mediastinal radiation without subcarinal blocking .
 adverse effect: pericardial effusion, gemcitabine
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:  pericardial effusion, gemcitabine 
Answer:
 adverse effect: pericardial effusion, gemcitabine