Question: From which country was the explorer who discovered the island of Manhattan?

<P0-S0> Ronne Entrance is a broad southwest entrance of the George VI Sound where it opens from the southeast portion of the Bellingshausen Sea at the southwest side of Alexander Island, Antarctica. <P0-S1>  The south side of the Monteverdi Peninsula occupies the north portion of the Ronne Entrance while Ellsworth Land occupies the southern portion of the entrance. <P0-S2>  The entrance receives much ice throughout the whole year mainly because the entrance protrudes eastward into the adjacent George VI Sound and the George VI Ice Shelf from the southwest section, the Ronne Entrance is also prone to ice flow from the Bach Ice Shelf (which separates the south side of the Beethoven Peninsula from the north side of the Monteverdi Peninsula) as well as receiving ice from the Wilkins Ice Shelf (mainly from the southernmost end of the ice shelf). <P0-S3>  There are a few islands situated within the Ronne Entrance, mainly in the southwest area. <P0-S4>  Some of these islands include the Eklund Islands, DeAtley Island, Spaatz Island, Case Island and Smyley Island. <P0-S5>  It was discovered on a sledge journey through the sound in December 1940 by U.S. Polar explorer Finn Ronne and Carl Eklund of the US Antarctic Service (USAS), 1939–41, and named "Ronne Bay". <P0-S6>  Finn Ronne covered more miles by ski and sled dog than any other explorer in history and mapped the last unknown coastline on earth on his Ronne Antarctic Research Expedition in 1947. <SEP> <P1-S0> The Schreierstoren (English incorrectly translated as: Weeper's Tower), originally part of the medieval city wall of Amsterdam, the Netherlands, was built in the 15th century. <P1-S1>  It was the location from which Henry Hudson set sail on his journey to Northern America. <P1-S2>  This expedition would lead to the discovery of the island of Manhattan among others. <P1-S3>  It was built as a defense tower in 1487. <P1-S4>  It is currently a café and nautical bookstore. <P1-S5>  The old name was 'Schreyhoeckstoren' meaning in old Dutch the sharp angle of the tower with the once connected citywalls. <P1-S6>  Later they started calling it in short the Schreierstoren. <SEP> <P2-S0> Henry Hudson ( 1565–1611) was an English sea explorer and navigator during the early 17th century, best known for his explorations of present-day Canada and parts of the northeastern United States. <SEP> <P3-S0> The Explorer Ridge is a mid-ocean ridge, a divergent tectonic plate boundary located about 241 km west of Vancouver Island, British Columbia, Canada. <P3-S1>  It lies at the northern extremity of the Pacific spreading axis. <P3-S2>  To its east is the Explorer Plate, which together with the Juan de Fuca Plate and the Gorda Plate to its south, is what remains of the once-vast Farallon Plate which has been largely subducted under the North American Plate. <P3-S3>  The Explorer Ridge consists of one major segment, the Southern Explorer Ridge, and several smaller segments. <P3-S4>  It runs northward from the Sovanco Fracture Zone to the Queen Charlotte Triple Junction, a point where it meets the Queen Charlotte Fault and the northern Cascadia subduction zone.