Simplify the following text for a Grade 8 native English-speaking person.
Original: DNA tests were conducted in 1994 on a tissue sample from Anderson located in a hospital and the blood of Prince Philip , Duke of Edinburgh , a grandnephew of Empress Alexandra .
Simplified: In 1994 , a tissue sample from Andersen in a hospital was used for DNA tests with the blood of Prince Philip , Duke of Edinburgh . Prince Philip was a grandnephew of Empress Alexandra .