original: following the death of schidlof from a heart attack in 1987 , the amadeus quartet disbanded .
simplifications: the amadeus quartet disbanded in 1987 after schidlof died from a heart attack . after schidlof died in 1987 , the amadeus quartet disbanded . following the death of schidlof , the amadeus quartet disbanded . following the death of schidlof from a heart attack in 1987 , the amadeus quartet disbanded . 1 . after the death of schidlof from a heart attack in 1987 , the amadeus quartet stopped playing together . the amadeus quartet disbanded following schidlof 's death in 1987 . after schidlof 's death from a heart attack in 187 , the amadeus quartet broke up . after the death of schidlof from a heart attack in 1987 , the amadeus quartet disbanded .