Romano Prodi will meet the US President George Bush in his capacity as president of the European commission.
George Bush is well known as the president of the European Union. 
( z1 know :ARG1 ( z2 person :name ( z3 name :op "George" :op "Bush" ) ) :ARG2 ( z4 president :ARG2-of ( z5 have-org-role :ARG0 z2 :ARG1 ( z6 organization :name ( z7 name :op "European" :op "Union" ) ) ) ) :ARG1-of ( z8 well ) )