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Gerard McMahon ( aka Gerard McMann and G Tom Mac ) ( born Gerard Thomas MacMahon , of Irish/English parentage , in Birmingham , England ) is an English singer-songwriter , multi-instrumentalist and producer who specialises in creating music for films and TV .
 Gerard McMahon, Gerard, Gerard, Birmingham
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gerard McMahon, Gerard, Gerard, Birmingham