Assertion: mason | /r/CapableOf | oppose the provision
Facets:
value: vigorously
type: MANNER
value: at the constitutional convention
type: LOCATION
value: despite being a slaveholder
type: OTHER
Source sentences:
text: At the Constitutional Convention, Mason vigorously opposed the provision that allowed the slave trade to continue until 1808 (despite being a slaveholder himself), referring to the slave trade as "disgraceful to mankind.