Assertion: park's portion | /r/CapableOf | become known on the upper east side
Facets:
value: by the 1890s
type: TEMPORAL
value: as "millionaires' row
type: OTHER
Source sentences:
text: On the Upper East Side, a portion of Fifth Avenue abutting lower Central Park became known as "Millionaires' Row" by the 1890s, due to the concentration of wealthy families in the area.