512
Our experiments found that miR - 34a was often deleted and epidermal growth factor receptor ( EGFR ) was frequently amplified in genomic DNA of 55 GBMs using single - nucleotide polymorphism DNA microarray .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None