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Cauda equina syndrome after spinal anaesthesia with hyperbaric 5 % lignocaine : a review of six cases of cauda equina syndrome reported to the Swedish Pharmaceutical Insurance 1993 - 1997 .
 Disease: Cauda equina syndrome; Chemical: lignocaine; Disease: cauda equina syndrome
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: Cauda equina syndrome, lignocaine, cauda equina syndrome 
Answer:
 Disease: Cauda equina syndrome; Chemical: lignocaine; Disease: cauda equina syndrome