With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Liev Schreiber's full name is Isaac Liev Schreiber, but he dropped the Isaac for his acting career.
text_B: BB10 can refer to  :. BB10 , a postcode district in the BB postcode area. BB postcode area. BB postcode area. Big Brother 10 , a television programme in various versions. Big Brother 10. Big Brother 10 ( disambiguation ). BlackBerry 10 , -LRB- formerly BBX -RRB- the most recent operating system for the BlackBerry line of smartphones developed by BlackBerry Ltd -LRB- formerly Research In Motion -RRB-. BlackBerry 10. BlackBerry 10. BB 10 -LRB- keelboat -RRB- , sailboat class
not_related.