Some 20k records have one 'City/Town', as their city. Some are preventing merges

Other strings to strip:
'0', 'City/Town', 'NoCity', 'City'

Note I thought this would find them

select * FROM civicrm_address WHERE city = 0 LIMIT 2\G

but that returns ones with St. Petersberg as a city! Don't do that!

select city, count(*) FROM civicrm.civicrm_address WHERE city IN('0', 'city', 'nocity', 'city/town') GROUP BY city LIMIT 20000;
+-----------+----------+

+-----------+----------+

+-----------+----------+