Budapest again became the focus of national political drama in the late 1980s, when Hungary led the reform movement in eastern Europe that broke the communist monopoly on political power and ushered in the possibility of multiparty politics.
Budapest again became the focus of national political drama after 1970.
Budapest again became the focus of national political drama in the late 1980s, which is later than 1970. I think the system confused the dates.
( z1 become :ARG1 ( z2 city :name ( z3 name :op "Budapest" ) ) :ARG2 ( z4 focus :ARG0 ( z5 drama :mod ( z6 nation ) :mod ( z7 politics ) ) :ARG1 z2 ) :mod ( z8 again ) :time ( z9 after :op ( z10 date-entity :year 1970 ) ) )