claim: Boeing 787 Dreamliner is a machine.
evidence: A jet airliner -LRB- or jetliner , or jet -RRB- is an airliner powered by jet engines -LRB- passenger jet aircraft -RRB- .. airliner. airliner. jet aircraft. jet aircraft. Airliners usually have two or four jet engines ; three-engined designs were popular in the 1970s but are less common today .. Most airliners today are powered by jet engines , because they are capable of safely operating at high speeds and generate sufficient thrust to power large-capacity aircraft .. The first airliners , introduced in the 1950s , used the simpler turbojet engine ; these were quickly supplanted by designs using turbofans , which are quieter and more fuel-efficient .. turbojet. turbojet. Airliners are commonly classified as either the generally long-haul widebody aircraft , or narrow-body aircraft .. long-haul. long-haul. widebody. wide-body aircraft. narrow-body. narrow-body