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