text: SELECT DISTINCT 
  	'eh_period' as scheme_id,
  	'PERIOD (EH)' AS title,
  	'English Heritage Periods List' AS description,
  	'English Heritage' AS attributionName,
  	'http://www.english-heritage.org.uk' AS attributionURL,
  	'http://creativecommons.org/licenses/by/3.0' AS licenseURL,
  	'http://data.ordnancesurvey.co.uk/id/country/england' AS coverage,
  	'http://www.english-heritage.org.uk' AS publisher,
  	strftime('%Y-%m-%dT%H:%M:%S', datetime('now')) AS issued
  	