With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Queen Victoria's mother was Princess Victoria.
text_B: The 1980 Portland Timbers season was the sixth season for the Portland Timbers in the now-defunct North American Soccer League .. Portland Timbers. Portland Timbers ( 1975–82 ). 1980 North American Soccer League season. North American Soccer League. North American Soccer League ( 1968–84 )
not_related.