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Interestingly , the androgen receptor ( AR ) , already known to play a significant role in prostate cancer tumorigenesis , has recently been implicated in the processes resulting in gene fusions by inducing the spatial proximity of genes involved in rearrangements , promoting the formation of double - strand DNA breaks ( DSB ) , and facilitating the recruitment of proteins for non - homologous end - joining ( NHEJ ) .
 Chemical: androgen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: androgen