sentences:  Its main organisation is based in Lahore in the province of Punjab with Gurdwara Dera Sahib its headquarter.The PSGPC is opposed by the Shiromani Gurdwara Prabandhak Committee (SGPC), which regards itself as the sole guardian of Sikh institutions and religion worldwide.The right to sole guardian is given to SGPC every 4 years in a fair elections in which Sikhs from around the world participate.