remove implication duo_focus (29735) -> group (499589)
create implication trio_focus (1423) -> group (499589) # duplicate of implication #28681
remove implication threesome (62894) -> group_sex (111870)
remove implication sandwich_position (4159) -> group_sex (111870)
remove implication train_position (2859) -> group_sex (111870)
remove implication triangle_position (854) -> group_sex (111870)
remove implication spitroast (17228) -> group_sex (111870)
remove implication reverse_spitroast (427) -> group_sex (111870)
remove implication collaborative_footjob (273) -> group_sex (111870)