Complex sentence: The movie that is based on the writer's experience in the Indian Navy and true classfied events, took more than five years to research spans 40 years and may cost upwards of Rs.100 Crores.
Split into simpler sentences: The movie that is based on the writer's experience in the Indian Navy and true classfied events, took more than five years to research. The story spans 40 years and may cost upwards of Rs.100 Crores.