Question: In 1852, Elisha Otis introduced the safety elevator, which prevented the fall of the cab if the cable broke. The design of the Otis safety elevator is somewhat similar to one type still used today. A governor device engages knurled roller(s), locking the elevator to its guides should the elevator descend at excessive speed. He demonstrated it at the New York exposition in the Crystal Palace in a dramatic, death-defying presentation in 1854, and the first such passenger elevator was installed at 488 Broadway in New York City on March 23, 1857.
Is there an answer to this question: Who created the safety elevator in 1852?

Answer: Elisha Otis


Question: His first professional TV job came when he was hired to direct one of the segments for the 1969 pilot episode of Night Gallery. The segment, "Eyes," starred Joan Crawford; she and Spielberg were reportedly close friends until her death. The episode is unusual in his body of work, in that the camerawork is more highly stylized than his later, more "mature" films. After this, and an episode of Marcus Welby, M.D., Spielberg got his first feature-length assignment: an episode of The Name of the Game called "L.A. 2017". This futuristic science fiction episode impressed Universal Studios and they signed him to a short contract. He did another segment on Night Gallery and did some work for shows such as Owen Marshall: Counselor at Law and The Psychiatrist, before landing the first series episode of Columbo (previous episodes were actually TV films).
Is there an answer to this question: What was Steven Spielberg's first feature-length assignment?

Answer: an episode of The Name of the Game called "L.A. 2017".


Question: In addition, like most Slavic languages, the Shtokavian verb also has one of two aspects: perfective or imperfective. Most verbs come in pairs, with the perfective verb being created out of the imperfective by adding a prefix or making a stem change. The imperfective aspect typically indicates that the action is unfinished, in progress, or repetitive; while the perfective aspect typically denotes that the action was completed, instantaneous, or of limited duration. Some Štokavian tenses (namely, aorist and imperfect) favor a particular aspect (but they are rarer or absent in Čakavian and Kajkavian). Actually, aspects "compensate" for the relative lack of tenses, because aspect of the verb determines whether the act is completed or in progress in the referred time.
Is there an answer to this question: What are two aspects the Kajkavian verb has?

Answer: unanswerable


Question: The five Great Lakes are located in the north-central portion of the country, four of them forming part of the border with Canada, only Lake Michigan situated entirely within United States. The southeast United States contain subtropical forests and, near the gulf coast, mangrove wetlands, especially in Florida. West of the Appalachians lies the Mississippi River basin and two large eastern tributaries, the Ohio River and the Tennessee River. The Ohio and Tennessee Valleys and the Midwest consist largely of rolling hills and productive farmland, stretching south to the Gulf Coast.
Is there an answer to this question: What are the two large Western tributaries of the Mississippi River?

Answer:
unanswerable