Complex sentence: Sardar Muhammad Arif Nakai was very great leader and he had been done very progressive work in his area and all poor people respect him very much in their hearts and well known as good politician as Baba Arif Nakai.
Split into simpler sentences: Sardar Muhammad Arif Nakai was a very great leader who had done tremendous progressive work in his area. Even today all poor people respect him very much in their hearts; so much so that he is remembered as Baba Arif Nakai.