http://en.wikipedia.org/wiki/John_Field_(composer)
http://ja.cantorion.org/composers/115/John_Field
_ Nocturne No. 5 in B flat Major by Field
http://www.youtube.com/watch?v=XWhb_imbzsQ
_ John Field Nocturne No 11
http://www.youtube.com/watch?v=m4QCDvIb43Y
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