With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lee Harvey Oswald was born in October.
text_B: Elsa D'Silva or Elsa Marie D'Silva is an experienced aviation professional who is interested in bringing about social change to improve the lives of women , youth and senior citizens through awareness , interaction and education .. aviation professional. aviation. Safecity.in is the first of her social projects .
not_related.