1707
Escape atrial complexes , which occurred following junctional premature complexes , failed to initiate tachycardia in the control state but tachycardia was always reinitiated by an identical escape sequence after procainamide .
 adverse effect: tachycardia, procainamide
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:  tachycardia, procainamide 
Answer:
 adverse effect: tachycardia, procainamide