With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: In July , U.S. President Barack Obama and his Russian counterpart , Dmitri Medvedev , agreed on outlines of a deal to replace the existing 1991 Strategic Arms Reduction Treaty , which expires in December .
text_B: Dmitri is an artefact
not-entailed.