With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Keith Urban is not a country singer.
text_B: On 2 July 2005 , a Live 8 concert was held at the Siegessaule -LRB- Victory Column -RRB- in the Tiergarten park in Berlin , Germany .. Live 8. Live 8. Siegessaule. Siegessaule. Tiergarten. Tiergarten ( park ). Berlin. Berlin. Germany. Germany. The event is also referred to as `` Live 8 Berlin '' or `` Live 8 Germany '' .. Live 8. Live 8. Berlin. Berlin. Germany. Germany. Initially , some music critics wrote the Berlin concert off as a failure when the original line-up was announced , with several complaining there were too many bands singing in German to appeal to the world .. Berlin. Berlin. This so-called `` problem '' -LRB- rubbished by Live 8 organiser Bob Geldof -RRB- was alleviated by the late addition of Green Day to the list of artists performing .. Live 8. Live 8. Bob Geldof. Bob Geldof. Green Day. Green Day. Lauryn Hill and Crosby , Stills & Nash were originally in the lineup , but both pulled out .. Lauryn Hill. Lauryn Hill. Green Day also caused a minor stir when they sang `` Sieg Heil to the President Gasman '' undoctored as part of their song Holiday .. Green Day. Green Day. Sieg Heil. Sieg Heil. Holiday. Holiday ( Green Day song )
not_related.