Based on the clue '763 foot mount royal stands in the center of this ...', what is the answer?

Based on the clue '75 tons 75 feet long this enormous creatures name...', what is the answer? What is associated with: 75000 national guardsmen were called up in this 1991 operation? What is associated with: 750000 fans were the friends in low places who joined this country star in central park in 199… What is associated with: 76 years old the original hass avocado tree died in 2002 in la habra heights in this state? What is associated with: 77 of these essays defending the constitution appeared in book form in 1788? Based on the clue '77 sunset strip actor who now manages wife ann mar...', what is the answer? What is associated with: 790000 year old flints from a site in israel provide the oldest known evidence of early mans c… Based on the clue '7th century king song tsen gampo introduced this r...', what is the answer?