create alias beach_background (7) -> beach (75270)
create alias cave_background (92) -> cave (14579)
create alias jungle_background (104) -> jungle (4859)
create alias sky_background (8) -> sky (149720)
create alias desert_background (72) -> desert (7525)
create alias field_background (82) -> field (3822)
remove implication forest_background (11857) -> forest (69240)
remove implication forest_background (11857) -> nature_background (16078)
remove implication nature_background (16078) -> nature (31297)
remove alias forest_bg (0) -> forest_background (11857)
remove alias nature_bg (0) -> nature_background (16078)
remove alias natural_bg (0) -> nature_background (16078)
remove alias natural_background (0) -> nature_background (16078)