Prince Edward Air
is an airline formerly headquartered in Charlottetown , Prince Edward Island , Canada . 
<triplet> Charlottetown <subj> Prince Edward Island <obj> part of <subj> Canada <obj> country <triplet> Prince Edward Island <subj> Charlottetown <obj> capital <subj> Canada <obj> country <triplet> Canada <subj> Prince Edward Island <obj> contains administrative territorial entity