Simplify the following text for a Grade 6 native English-speaking person.
Original: In 1687 Bombay was placed at the head of all the Company 's possessions in India ; but in 1753 the government of Bombay became subordinate to that of Calcutta .
Simplified: In 1687 Bombay became the capital of the Company 's territories in India . However in 1753 Calcutta was in charge of the Government of Bombay .