Table:
text: List of world cups and world championships for juniors and youth
Men
Men
Sport Competition_name Competing_entities Age_groups Held_every
Baseball World Junior Baseball Championship Nations Under-18 One year through 2000, now two years
Baseball World Youth Baseball Championship Nations Under-16 One year through 1998, two years starting in 2001
Baseball Big League World Series Communities 16-18 One year
Baseball Senior League World Series Communities 14-16 One year
Baseball Junior League World Series Communities 13-15 One year
Baseball Little League World Series Communities 13 or younger One year
Basketball FIBA Under-21 World Championship Nations 21 or younger Four years until 2005
Basketball FIBA Under-19 World Championship Nations 19 or younger Four years until 2007, now two years
Basketball FIBA Under-17 World Championship Nations 17 or younger Two years

Question: What are the age groups for the Big League World Series under the Junior and Youth Men's World Cup and World Championship List?