Question: Who was known for his promotion of inoculation for disease prevention and owned the slave Onesimus?
Sentence (from "Onesimus (Boston slave)"): Onesimus (late 1600s–1700s) was an African-born man held as a slave by Puritan minister Cotton Mather, who helped mitigate the impact of a smallpox outbreak in Boston by introducing Mather to the principle of inoculation.
Relevant evidence: Yes