With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Matt Damon is a person.
text_B: In algebraic geometry , the first polar , or simply polar of an algebraic plane curve C of degree n with respect to a point Q is an algebraic curve of degree n − 1 which contains every point of C whose tangent line passes through Q .. algebraic geometry. algebraic geometry. algebraic plane curve. algebraic plane curve. It is used to investigate the relationship between the curve and its dual , for example in the derivation of the Plucker formulas .. dual. Dual curve
not_related.