Context: The mid-19th century burial ground at Ford Park Cemetery was reopened in 2007 by a successful trust and the City council operate two large early 20th century cemeteries at Weston Mill and Efford both with crematoria and chapels. There is also a privately owned cemetery on the outskirts of the city, Drake Memorial Park which does not allow headstones to mark graves, but a brass plaque set into the ground.

Question: When did Ford Park Cemetery first operate?

Answer: mid-19th century