Complex sentence: At the time of their unveiling in 1930, India also supposed to become a British dominion soon, however India became independent within the next 17 years and the Secretariat became the seat of power of a sovereign India.
Split into simpler sentences: At the time of their unveiling in 1930, India was also supposed to become a British dominion soon. However, India became independent within the next 17 years and the Secretariat became the seat of power of a sovereign India.