table: [['name', 'location', 'enrollment', '1 - year ranking of 727', '5 - year ranking of 693'], ['centennial collegiate vocational institute', 'guelph', '1533', '63', '22'], ['centre dufferin district high school', 'shelburne', '998', '265', '281'], ['centre wellington district high school', 'fergus', '1459', '330', '246'], ['college heights secondary school', 'guelph', '649', '717', '688'], ['erin district high school', 'erin', '616', '197', '148'], ['guelph collegiate vocational institute', 'guelph', '1314', '16', '30'], ['john f ross collegiate vocational institute', 'guelph', '1895', '181', '165'], ['norwell district secondary school', 'palmerston', '795', '126', '343'], ['orangeville district secondary school', 'orangeville', '1574', '181', '194'], ['wellington heights secondary school', 'mount forest', '680', '371', '426'], ['westside secondary school', 'orangeville', '996', '478', '343']]
ref: the lowest Ranking shown in either the 1 Year or 5 Year Ranking is 16
template: the lowest [ENT] shown in either the [ENT] or [ENT] is [ENT]