Complex sentence: The marchers sang the hymn "Ragupathi Raagava Rajaram" and a Tamil song which was composed by Namakkal Ramalingam Pillai for the march.
Split into simpler sentences: The marchers sang the hymn "Ragupathi Raagava Rajaram". They also sang a song which was composed by Namakkal Ramalingam Pillai for the march.