A gramophone record (phonograph record in American English) or vinyl record, commonly known as a "record", is an analogue sound storage medium in the form of a flat polyvinyl chloride (previously shellac) disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. Phonograph records are generally described by their diameter in inches (12", 10", 7"), the rotational speed in rpm at which they are played (16 23, 33 13, 45, 78), and their time capacity resulting from a combination of those parameters (LP long playing 33 13 rpm, SP 78 rpm single, EP 12-inch single or extended play, 33 or 45 rpm); their reproductive quality or level of fidelity (high-fidelity, orthophonic, full-range, etc.), and the number of audio channels provided (mono, stereo, quad, etc.).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In what method is the rotational speed measured in?
Ah, so.. rpm

On September 30, 1987, Foster filed an application with the United States Patent and Trademark Office to patent his invented sport. The patent application covered the rules of the game, specifically detailing the goalposts and rebound netting and their impact on gameplay. Foster's application was granted on March 27, 1990. The patent expired on September 30, 2007.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): On what date was the expiration of Foster's patent?
Ah, so.. September 30, 2007

Sassou Nguesso aligned the country with the Eastern Bloc and signed a twenty-year friendship pact with the Soviet Union. Over the years, Sassou had to rely more on political repression and less on patronage to maintain his dictatorship.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who aligned the country with the Western Bloc?
Ah, so..
unanswerable