Seattle (i/sitl/) is a West Coast seaport city and the seat of King County. With an estimated 662,400 residents as of 2015[update], Seattle is the largest city in both the state of Washington and the Pacific Northwest region of North America. In July 2013 it was the fastest-growing major city in the United States, and remained in the top five in May 2015 with an annual growth rate of 2.1%. The Seattle metropolitan area of around 3.6 million inhabitants is the 15th largest metropolitan area in the United States. The city is situated on an isthmus between Puget Sound (an inlet of the Pacific Ocean) and Lake Washington, about 100 miles (160 km) south of the CanadaUnited States border. A major gateway for trade with Asia, Seattle is the third largest port in North America in terms of container handling as of 2015.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): By 2015 what was Seattle's population?
Ah, so.. 662,400

The Roman Catholic Church canon law also includes the main five rites (groups) of churches which are in full union with the Roman Catholic Church and the Supreme Pontiff:
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who leads all Christian churches?
Ah, so.. unanswerable

Napoleon III, since the Crimean War Britain's closest ally, visited London in April 1855, and from 17 to 28 August the same year Victoria and Albert returned the visit. Napoleon III met the couple at Dunkirk and accompanied them to Paris. They visited the Exposition Universelle (a successor to Albert's 1851 brainchild the Great Exhibition) and Napoleon I's tomb at Les Invalides (to which his remains had only been returned in 1840), and were guests of honour at a 1,200-guest ball at the Palace of Versailles.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many guests attented a ball at the Palace of Versaille with Napoleon III and the royal couple in attendence?
Ah, so..
1,200