Original: On April 10, 1919, a protest was held at the residence of the Deputy Commissioner of Amritsar, a city in Punjab, a large province in the northwestern part of the then unpartitioned India.
Simplified: On April 10, 1919, a protest was held at the residence of the Deputy Commissioner of Amritsar, a city in Punjab, a large province in the northwestern part of what was then undivided India.