Simplify the following text for a Grade 7 native English-speaking person.
Original: Towards the end of the nineteenth century interest in the ` Hero of Camperdown ' was renewed , which resulted in the erection of a headstone in Holy Trinity , Sunderland churchyard in 1888 .
Simplified: Towards the end of the nineteenth century interest in the ` Hero of Camperdown ' was renewed . A headstone was put up in Holy Trinity , Sunderland churchyard in 1888 .