With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Franklin D. Roosevelt started the development of a nuclear weapon.
text_B: Osiek -LSB- ` ose1k -RSB- is a village in the administrative district of Gmina Mochowo , within Sierpc County , Masovian Voivodeship , in east-central Poland .. Poland. Poland. Voivodeship. Voivodeships of Poland. Masovian. Masovian Voivodeship. County. Powiat. Sierpc. Sierpc County. Gmina. Gmina. Mochowo. Gmina Mochowo. village. village. Gmina Mochowo. Gmina Mochowo. Sierpc County. Sierpc County. Masovian Voivodeship. Masovian Voivodeship
not_related.