Complex sentence: Formed in 1976 the club has always been an amateur and academy side but in December 2011 they announced there start into professional football and got accepted into the I-League 2nd Division, the second tier of football in India.
Split into simpler sentences: Formed in 1976 the club has always been an amateur and academy side till 2011. In December 2011, They announced their intention to turn professional and got accepted in the I-League 2nd Division, the second tier of football in India.