remove implication duo_focus (30087) -> group (505743)
create implication trio_focus (1457) -> group (505743) # duplicate of implication #28681
remove implication threesome (63469) -> group_sex (112853)
remove implication sandwich_position (4205) -> group_sex (112853)
remove implication train_position (2883) -> group_sex (112853)
remove implication triangle_position (857) -> group_sex (112853)
remove implication spitroast (17398) -> group_sex (112853)
remove implication reverse_spitroast (427) -> group_sex (112853)
remove implication collaborative_footjob (278) -> group_sex (112853)