Simplify the following text for a Grade 6 native English-speaking person.
Original: On 15 April 1989 , the ground was the scene of one of the worst sporting tragedies of all time when 94 Liverpool fans ( the final death toll was 96 ) were crushed to death in an FA Cup semi-final in the infamous Hillsborough disaster .
Simplified: On 15 April 1989 , the ground was the scene of one of the worst sporting tragedies of all time . 94 Liverpool fans were crushed to death in an FA Cup semi-final .