With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: By the immunization of the mother, cerebral palsy is partly preventable.
text_B: Ivan Gerald Haines -LRB- born 14 September 1968 -RRB- is an English former professional footballer .. He played for Gillingham between 1987 and 1991 , making 51 appearances in the Football League .. Gillingham. Gillingham F.C.. the Football League. the Football League
not_related.