sentence1: Previous secretaries include Alison Murison , Tom Mabbott , who received an MBE for services to Scottish Horticulture , John MacLennan , and Dr. John MacKay .
sentence2: Previous secretaries were John MacKay , who received an MBE for services to Scottish Horticulture , Alison Murison , Tom Mabbott , and Dr. John MacLennan .