slavery

The road was made famous by The Beatles but many believe it was named after a slave trader.
The university says the use of Cass's name is "incompatible" with its commitment to support the Black community and to actively oppose racism in all forms.
The 1939 film will return to the streaming service, accompanied by a "discussion of its historical context".
The decision follows the toppling of a statue of Edward Colston by anti-racist protesters in Bristol.
His legacy of philanthropy was designed to shape him into a father figure for Bristol. Now, those myths are starting to shatter.
Protesters pulled down a statue of Edward Colston in Bristol – but other buildings and street names remain.
But Labour leader stresses it should have been removed peacefully: "You can't, in 21st-century Britain, have a slaver on a statue.”
The elected mayor, who is of Jamaican heritage, said he "could not pretend" he felt "any real sense of loss" after anti-racist demonstrators pulled down the monument.
The group of academics wanted to send a message to young, Black people to pursue their dreams.
Reparations are meant to redress the structural and profound financial imbalances created by the slave trade, not to boost the reach and status of a western university, writer Claire Heuchan writes.