With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Down syndrome was fully described by John Langdon Down in 1866.
text_B: Fernando Bastos de Avila -LRB- March 17 , 1918 -- November 6 , 2010 -RRB- was a Brazilian Roman Catholic priest .. Roman Catholic. Roman Catholic. A member of the Society of Jesus , de Avila was a member of the Academia Brasileira de Letras and vice-chancellor of Pontificia Universidade Catolica .. Society of Jesus. Society of Jesus. Academia Brasileira de Letras. Academia Brasileira de Letras
not_related.