With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bam Margera is an American.
text_B: Blakely Elizabeth Mattern -LRB- born September 17 , 1988 in Simpsonville , South Carolina -RRB- is an American soccer defender who plays for Carolina Elite Cobras .. Carolina Elite Cobras. Carolina Elite Cobras. American. United States. soccer. association football. defender. Defender ( association football )
not_related.