| http://www.w3.org/ns/prov#value | - Pennsylvania Society for Promoting the Abolition of Slavery.; Providence Society for Abolishing the Slave-Trade.; Connecticut Society for the Promotion of Freedom, and the Relief of Persons Unlawfully Holden in Bondage.; New-York Society for Promoting the Manumission of Slaves, and Protecting Such of Them as Have Been, or May Be Liberated.; Maryland Society for Promoting the Abolition of Slavery,
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