Suppose Olaudah Equiano (1745–1797), known in his lifetime as Gustavus Vassa, was a prominent African in London, a freed slave, writer, and anti-slavery campaigner in the 18th century. His autobiography, published in 1789, helped in the creation of the Slave Trade Act 1807 which eventually led to the abolition of the slave trade.
Can we infer that "Olaudah Equiano was a slave owner."?