He met U.S. President, George W. Bush, in Washington and British Prime Minister, Tony Blair, in London.
He met the British Prime Minister in Washington.
He met an American president in London.
( z1 meet :ARG0 ( z2 he ) :ARG1 ( z3 person :ARG0-of ( z4 have-org-role :ARG1 ( z5 country :name ( z6 name :op "Britain" ) ) :ARG2 ( z7 minister :mod ( z8 prime ) ) ) ) :location ( z9 city :name ( z10 name :op "Washington" ) ) )