Complex sentence: In a career, spanning from 1936 till 1963, Suraiya sang 338 songs in films (which were mostly her own films) and 2 of which were non-film songs, namely,'Tum rahe kahan ko piya' and'Hum tum karenge pyar'.
Split into simpler sentences: In a career, spanning from 1936 till 1963, Suraiya sang 338 songs in films (which were mostly her own films) and 2 of which were non-film songs, viz. 'tum rahe kahan ko piya' and'Hum tum karenge pyar'.