What is the fine-grained topic of the following text: Representatives of Unions & Association, members of Tanvi Sangam, CISF personnel, Employees of TSTPS Kaniha & their family members & Children from different schools participated in large numbers in this program and made it a grand success. Only return the topic.
Participation in a Program by Unions, Associations, and TSTPS Kaniha Employees & Families