With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Paleogene is a geologic system that spans 41 million years.
text_B: The Cross of Valour was established in 1975 as the highest Australian Bravery Award .. The awards were established as part of the institution of the Australian Honours System .. Australian Honours System. Australian Honours System. The Cross of Valour has been awarded to five Australian civilians and although there has been no Australian military recipient , they would be eligible in situations where normal honours to the military do not apply .. The Cross of Valour is awarded `` only for acts of the most conspicuous courage in circumstances of extreme peril '' .. The award carries the post-nominal initials CV ; awards may be made posthumously .
not_related.