Assertion: mayor's office | /r/CapableOf | become nonpartisan
Facets:
value: in 1999
type: TEMPORAL
value: officially
type: MANNER
Source sentences:
text: For most of the 20th century, before the decline of patronage and the mayor's office becoming officially nonpartisan in 1999, the mayor was the de facto leader of the city's Democratic Party, and had great influence over the ward organizations.