The bulk update request #11474 is pending approval.

create alias laying_on_sofa (0) -> lying_on_sofa (1627)
create alias prone_position (8) -> on_front (68380)
create alias lying_prone (2) -> on_front (68380)
create alias laying_prone (0) -> on_front (68380)
create alias supine_position (0) -> on_back (261875)
create alias lying_supine (0) -> on_back (261875)
create alias laying_supine (0) -> on_back (261875)

Reason: Adds additional aliases to various lying-related tags.

The tags laying_prone, supine_position, lying_supine, and laying_supine have not been tagged before, but are included for consistency with other aliases and full coverage of reasonable terms.

The prone_position tag has overlap with prone_bone_position, but it's ambiguous as to its intended use. I think it's cleaner to alias it to the most generic applicable tag rather than disambiguate.