Assertion: empire's rival | /r/CapableOf | secure the crown of castile
Facets:
value: for isabella
type: TRANSITIVE-OBJECT
Source sentences:
text: The Christian rivals, Castile and Portugal, came to formal agreements over the division of new territories in the Treaty of Alcaçovas (1479), as well as securing the crown of Castile for Isabella, whose accession was challenged militarily by Portugal.