With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jennifer Aniston is engaged to Justin Theroux.
text_B: Pennsylvanian may refer to  :. A person or thing from Pennsylvania. Pennsylvania. Pennsylvania. Pennsylvanian -LRB- geology -RRB- , a geological subperiod of the Carboniferous Period. Pennsylvanian -LRB- train -RRB- , an Amtrak train
not_related.