sentences:  In 1892, Nikola Tesla moved his laboratory to the 4th floor of a factory building at 33-35 South Fifth Avenue (now LaGuardia Place), on the western boundary of Washington Square Village.In March 1895, a fire destroyed the laboratory and caused the loss of ten years of Tesla's research.For the first half of the 20th century the WSV area remained a neighborhood of mostly working class flats, lofts and factories.