drop table if exists authors_descriptions;
drop table if exists authors_locations;
drop table if exists authors_names;
drop table if exists editors_descriptions;
drop table if exists editors_locations;
drop table if exists editors_names;
drop table if exists descriptions;
drop table if exists draft_names;
drop table if exists past_descriptions;
drop table if exists past_draft_names;
drop table if exists past_locations;
drop table if exists past_names;
drop table if exists search_states;
drop table if exists sequence_states;