With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Portal 2 is a sequel.
text_B: Trinity Episcopal Church , originally known as Christ Church , is a historic house of worship in Apalachicola , Florida , United States , located at the corner of Avenue D and 6th Street -LRB- Gorrie Square -RRB- .. Apalachicola. Apalachicola, Florida. Florida. Florida. United States. United States. On June 30 , 1972 , it was added to the U.S. National Register of Historic Places .. National Register of Historic Places. National Register of Historic Places
not_related.