In addition to the change in the mean length of the calendar year from 365.25 days (365 days 6 hours) to 365.2425 days (365 days 5 hours 49 minutes 12 seconds), a reduction of 10 minutes 48 seconds per year, the Gregorian calendar reform also dealt with the accumulated difference between these lengths. The canonical Easter tables were devised at the end of the third century, when the vernal equinox fell either on 20 March or 21 March depending on the year's position in the leap year cycle. As the rule was that the full moon preceding Easter was not to precede the equinox the equinox was fixed at 21 March for computational purposes and the earliest date for Easter was fixed at 22 March. The Gregorian calendar reproduced these conditions by removing ten days.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What was reduced by forty-eight minutes and ten seconds?
Ah, so.. unanswerable

In the 20th century, Greek composers have had a significant impact on the development of avant garde and modern classical music, with figures such as Iannis Xenakis, Nikos Skalkottas, and Dimitri Mitropoulos achieving international prominence. At the same time, composers and musicians such as Mikis Theodorakis, Manos Hatzidakis, Eleni Karaindrou, Vangelis and Demis Roussos garnered an international following for their music, which include famous film scores such as Zorba the Greek, Serpico, Never on Sunday, America America, Eternity and a Day, Chariots of Fire, Blade Runner, among others. Greek American composers known for their film scores include Yanni and Basil Poledouris. Notable Greek opera singers and classical musicians of the 20th and 21st century include Maria Callas, Nana Mouskouri, Mario Frangoulis, Leonidas Kavakos, Dimitris Sgouros and others.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who is one of the notable Greek opera singers in the 20th century?
Ah, so.. Maria Callas

The relationship between the Slavs and a tribe called the Veneti east of the River Vistula in the Roman period is uncertain. The name may refer both to Balts and Slavs.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What tribe was to the east of the Slavs?
Ah, so..
unanswerable