What is referred to by '9 13 15'?

Based on the clue '8th most populous city in the world it was once ca...', what is the answer? Based on the clue '8th most populous country in the world this bengal...', what is the answer? Based on the clue '8th or 9th century bc the land of the lotus eaters', what is the answer? Based on the clue '8th state of the union it was the 1st state to sec...', what is the answer? Based on the clue '9 celebrities in a tic tac toe like grid help cont...', what is the answer? Based on the clue '9 congressional medals have been awarded to these ...', what is the answer? Based on the clue '9 days after garfields inauguration alexander ii o...', what is the answer? What is associated with: 9 foot man from the biblical books of samuel the franchise that created the frappuccino in 199…