Assertion: stringer | /r/CapableOf | hone his campaign pitch
Facets:
value: after launching a brief mayoral run
type: TEMPORAL
Source sentences:
text: After launching a brief mayoral run in 2013, eyeing a challenge to Mayor Bill de Blasio in 2017, winning two citywide elections, and more than six years as a citywide official, Stringer has honed his campaign pitch.