With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nanotechnology is manipulation of matter.
text_B: The Thayer Lake East Shelter Cabin is the ruined remains of a historic backcountry shelter in the Admiralty Island National Monument , part of the Tongass National Forest in Southeast Alaska .. Admiralty Island National Monument. Admiralty Island National Monument. Tongass National Forest. Tongass National Forest. Southeast Alaska. Southeast Alaska. It was one of a number of such facilities built by Civilian Conservation Corps -LRB- CCC -RRB- on the Admiralty Island Canoe Route between 1933 and 1937 .. Civilian Conservation Corps. Civilian Conservation Corps. This cabin , a three-sided Adirondack-style log structure with shake walls and roof , was built in 1936 , and located on the lake near the portage trail connecting to Distin Lake .. Unlike other cabins built by the CCC on the island , which were of post-and-beam construction , in this one the logs were saddle-notched together at the corners .. The cabin was listed on the National Register of Historic Places in 1995 .. National Register of Historic Places. National Register of Historic Places. It was described as lacking its roof and being derelict at the time of its listing .
not_related.