Question: U.S. Route 4 (US 4) is a part of the U.S. Highway System that runs from East Greenbush, is a town in Rensselaer County, New York, in which country?
Context: New York State Route 405 (NY 405) was a state highway in Rensselaer County, New York, in the United States.  It ran for 2.63 mi between an intersection with U.S. Route 4 in North Greenbush and a junction with NY 66 just inside the Troy city limits.  In between, NY 405 intersected NY 136.  The entirety of NY 405 was originally part of NY 40.  In the February–March 1973, NY 40 was truncated northward to NY 7 in northern Troy and its former routing from US 4 to NY 66 was assigned NY 405.  Ownership and maintenance of most of NY 405 was transferred to Rensselaer County on April 1, 1980, at which time the parts of the route given to the county were redesignated as part of County Route 74 (CR 74). New York State Route 43 (NY 43) is a state highway in Rensselaer County, New York, in the United States.  It extends for 24.00 mi from Interstate 90 (I-90) exit 8 in North Greenbush to the Massachusetts state line, where it continues into Williamstown as Massachusetts Route 43.  Most of NY 43 is a two-lane highway that passes through a mixture of rural and residential areas; however, its westernmost 2 mi between I-90 and U.S. Route 4 (US 4) is a four-lane divided highway.  NY 43 has an overlap with NY 66 in Sand Lake and intersects NY 22 in Stephentown. New York State Route 154 (NY 154) was a state highway in Rensselaer County, New York, in the United States.  It began at an intersection with U.S. Route 4 (US 4) in the city of Troy and ended at then-County Route 77 (CR 77, now NY 351) in the hamlet of Poestenkill.  Along the way, it intersected NY 66 and NY 355.  The route was assigned in the early 1930s and eliminated in 1980 as part of a highway maintenance swap between the state of New York and Rensselaer County.  The portion of the highway between the Troy city line and NY 355 became County Route 130 while the part connecting NY 355 to Poestenkill became an extension of NY 355. New York State Route 915E (NY 915E) is an unsigned reference route designation for Third Avenue Extension in East Greenbush, located in Rensselaer County, New York, in the United States.  The east–west highway extends for 1.67 mi from an intersection with NY 151 east of the Rensselaer city limits to a junction with U.S. Route 4 (US 4) south of the hamlet of Defreestville.  NY 915E was designated as New York State Route 381 from the late 1930s to 1962 and part of NY 43 from that time to the late 1990s, when it gained its current designation. The East Greenbush Community Library serves a chartered special district, including the town of East Greenbush, New York and portions of the town of Schodack, New York under contract, bringing the total number of patrons to nearly 30,000.  The library is also a member of the Upper Hudson Library System, a resource-sharing consortium consisting of the 29 public libraries in Albany and Rensselaer Counties.  Located in southern Rensselaer County, New York, off Route 151 (Luther Road), the library shares a 39 acre tract of former farmland with the YMCA and Hawthorne Ridge, a multi-use senior housing complex. New York State Route 151 (NY 151) is an 8.23 mi state highway located in Rensselaer County, New York, in the United States.  Its western terminus is at an interchange with U.S. Route 9 (US 9) and US 20 in Rensselaer, and its eastern terminus is at a junction with NY 150 in Shivers Corners, a hamlet in the town of Schodack.  It also has an intersection with US 4 in East Greenbush.  NY 151 was assigned to most of its current alignment as part of the 1930 renumbering of state highways in New York.  In Rensselaer, NY 151 has been altered several times, with the most recent change coming in the late 1990s.  The current western terminus of NY 151 was once the western terminus of NY 43. New York State Route 152 (NY 152) was an east–west state highway in Rensselaer County, New York, in the United States.  The western terminus of the route was at an intersection with U.S. Route 4 (US 4) and NY 43 in the town of North Greenbush.  Its eastern terminus was at a junction with NY 150 in the town of Sand Lake.  NY 152 was little more than a connector between the hamlets of Defreestville and Sliters. East Greenbush is a town in Rensselaer County, New York, United States.  It is a suburb of Albany, New York.  The population was 16,473 at the 2010 census.  The word Greenbush is derived from the Dutch "het groen bosch," referring to the pine woods that originally covered the land.  The first settlement of the land now known as East Greenbush was made by tenants under patroon Kiliaen van Rensselaer circa 1630.  The town was established in 1855 as Clinton, and was renamed in 1858.  It is mostly suburban along its major highways and rural in the southwestern and northeastern corners. New York State Route 136 (NY 136) is a state highway within the town of North Greenbush in Rensselaer County, New York, in the United States.  It begins at an intersection with U.S. Route 4 (US 4) just south of Troy and ends at a junction with NY 150 in the hamlet of Wynantskill.  NY 136 provides access to Hudson Valley Community College, located in an otherwise residential area of suburban Troy.  The route was assigned in the late 1930s as a connector between US 4 and Winter Street, then part of NY 40.  NY 136 was extended to its current length in 1980. U.S. Route 4 (US 4) is a part of the U.S. Highway System that runs from East Greenbush, New York, to Portsmouth, New Hampshire.  In the U.S. state of New York, US 4 extends 79.67 mi from an intersection with US 9 and US 20 in East Greenbush to the Vermont state line northeast of Whitehall.  While the remainder of US 4 east of New York is an east–west route, US 4 in New York is signed north–south due to the alignment the route takes through the state.  The portion of the route between Waterford and Whitehall is part of the Lakes to Locks Passage, an All-American Road.
Answer: United States