With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sammy Cahn was an American who died in 1993.
text_B: George Perkins Marsh -LRB- March 15 , 1801 -- July 23 , 1882 -RRB- , an American diplomat and philologist , is considered by some to be America 's first environmentalist and the precursor to the sustainability concept , although `` conservationist '' would be more accurate .. diplomat. diplomat. philologist. philology. The Marsh-Billings-Rockefeller National Historical Park in Vermont takes its name , in part , from Marsh .. Marsh-Billings-Rockefeller National Historical Park. Marsh-Billings-Rockefeller National Historical Park
not_related.