With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: There is a Christian state called Greece with state churches.
text_B: The knockout stage of the 2006 -- 07 UEFA Champions League started on 20 February 2007 and culminated with the final match at the Olympic Stadium in Athens on 23 May .. Olympic Stadium. Olympic Stadium ( Athens ). Athens. Athens. The draw for the first knockout round took place on 15 December 2006 and involved each of the top two teams from each group in the group stage .. The winner of each group was paired up with the runner-up from another group .. Each knockout round tie consisted of two-legged matches , home and away , in which the team with the higher aggregate score progressed to the next round , with the exception of the final , which was played over just one match at a neutral venue .. In the event that the two teams ' aggregate scores were tied , the team that scored more goals in their away leg would progress to the next round .
not_related.