question: How vast was the backgrounds of the captives ?
answer: West African coastline stretching from Senegal to Angola and in some cases from the south-east coast
turker_answer: The backgrounds of the captives included the West African coastline stretching from Senegal to Angola and in some cases the south-east coast .
rule-based: The backgrounds of the captives was west African coastline stretching from Senegal to Angola and in some cases from the south-east coast .