The Duke of Edinburgh and I are very happy that the Prince of Wales and Mrs. Parker Bowles are to marry.
 A duke is a male holding the highest hereditary title in the British and certain other peerages
A duke is a male holding the highest hereditary title in the British and certain other peerages by definition.
( z1 duke :domain ( z2 male :ARG0-of ( z3 hold :ARG1 ( z4 title :mod ( z5 hereditary ) :ARG1-of ( z6 have-degree :ARG2 ( z7 high ) :ARG3 ( z8 most ) :ARG5 ( z9 and :op ( z10 country :name ( z11 name :op "Britain" ) ) :op ( z12 peerage :mod ( z13 other ) :mod ( z14 certain ) ) ) ) ) ) ) )