Simplify the following text for a Grade 4 native English-speaking person.
Original: Gary Moore died of a suspected heart attack , at the age of 58 during the early hours of 6 February 2011 . At the time , he was on holiday at the Kempinski Hotel in Estepona , Spain , with his girlfriend , who raised the alarm at 4:00 am .
Simplified: On 6 February 2011 , Moore died in his hotel room in Estepona , Spain .