Original sentence: However, the title of Registered Piano Technician must be earned by passing a series of examinations.The PTG is a primarily American trade association with open membership.The Piano Technicians Guild provides educational opportunities at annual and regional seminars and conventions
Edited sentence: However, the title of Registered Piano Technician must be earned by passing a series of rigorous examinations.The PTG is a trade association with open membership.The Piano Technicians Guild has numerous educational opportunities at annual and regional seminars and conventions.These are listed on the PTG Website