In addressing the question of who invented the incandescent lamp, historians Robert Friedel and Paul Israel list 22 inventors of incandescent lamps prior to Joseph Swan and Thomas Edison. They conclude that Edison's version was able to outstrip the others because of a combination of three factors: an effective incandescent material, a higher vacuum than others were able to achieve (by use of the Sprengel pump) and a high resistance that made power distribution from a centralized source economically viable.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many inventors do historians list that did not invent the incandescent lamp?
Ah, so.. unanswerable

In 1964, Turkey tried to invade Cyprus in response to the continuing Cypriot intercommunal violence. But Turkey was stopped by a strongly worded telegram from the US President Lyndon B. Johnson on 5 June, warning that the US would not stand beside Turkey in case of a consequential Soviet invasion of Turkish territory. Meanwhile, by 1964, enosis was a Greek policy that could not be abandoned; Makarios and the Greek prime minister Georgios Papandreou agreed that enosis should be the ultimate aim and King Constantine wished Cyprus "a speedy union with the mother country". Greece dispatched 10,000 troops to Cyprus to counter a possible Turkish invasion.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many troops did Greece send to Cyprus?
Ah, so.. 10,000

Studio producers Richard D. Zanuck and David Brown offered Spielberg the director's chair for Jaws, a thriller-horror film based on the Peter Benchley novel about an enormous killer shark. Spielberg has often referred to the gruelling shoot as his professional crucible. Despite the film's ultimate, enormous success, it was nearly shut down due to delays and budget over-runs. But Spielberg persevered and finished the film. It was an enormous hit, winning three Academy Awards (for editing, original score and sound) and grossing more than $470 million worldwide at the box office. It also set the domestic record for box office gross, leading to what the press described as "Jawsmania.":248 Jaws made Spielberg a household name and one of America's youngest multi-millionaires, allowing him a great deal of autonomy for his future projects.:250 It was nominated for Best Picture and featured Spielberg's first of three collaborations with actor Richard Dreyfuss.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which one of Spielberg's movies has he said had few problems directing?
Ah, so..
unanswerable