With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Charles Marie de La Condamine was born in 1701.
text_B: Charles Marie de La Condamine -LRB- 28 January 1701 -- 13 February 1774 -RRB- was a French explorer , geographer , and mathematician .. explorer. explorer. geographer. geographer. mathematician. mathematician. He spent ten years in present-day Ecuador measuring the length of a degree latitude at the equator and preparing the first map of the Amazon region based on astronomical observations .. Ecuador. Ecuador. equator. equator. Amazon. Amazon Basin. Furthermore he was a contributor to the Encyclopedie ou Dictionnaire raisonne des sciences , des arts et des metiers .
related.