Ronan Tynan
In the United States , audiences know him for his involvement with that vocal group and for his renditions of "God Bless America . " He is also known for participating in the 1984 and 1988 Summer Paralympics . 
<triplet> 1984 <subj> 1984 <obj> point in time <subj> 1988 Summer Paralympics <obj> followed by <triplet> 1988 Summer Paralympics <subj> 1988 <obj> point in time