remove alias pregnant_balls (0) -> ball_pregnancy (0)
remove alias pregnant_ball (0) -> ball_pregnancy (0)
remove alias pregnant_testicles (0) -> ball_pregnancy (0)
remove alias pregnant_testicle (0) -> ball_pregnancy (0)
remove alias balls_pregnancy (5) -> ball_pregnancy (0)
remove implication ball_pregnancy (0) -> pregnant (45577)
remove implication ball_pregnancy (0) -> balls (1156710)