Assertion: empire's son | /r/CapableOf | demonstrate his martial prowess
Facets:
value: by capturing constantinople
type: MANNER
value: at the age of 21
type: TEMPORAL
Source sentences:
text: The son of Murad II, Mehmed the Conqueror, reorganized the state and the military, and demonstrated his martial prowess by capturing Constantinople on 29 May 1453, at the age of 21.