Deborah Wilson
She participated in the 1973 World Aquatics Championships and 1975 World Aquatics Championships but did not medal in either championship . 
<triplet> 1973 World Aquatics Championships <subj> 1973 <obj> point in time <subj> 1975 World Aquatics Championships <obj> followed by <triplet> 1975 World Aquatics Championships <subj> 1975 <obj> point in time